Free tool · Travel · on the roadmap

Every carrier in your destination, listed.

City-level network rankings are on the esimgomobile roadmap — measured quality data, not marketing maps.

🗺️

On the roadmap

City-level network rankings need a licensed network-quality dataset — measured speeds, congestion and real 5G availability, not carrier marketing maps. We won’t publish rankings on anecdotes. When the dataset lands, this page becomes the interactive ranking tool.

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What this tool does

The Best Network tool will answer a question coverage maps never do: which network is actually best here — in this city, on this street? Marketing coverage maps show where a signal exists. They don't show congestion at 7pm, dead zones in the metro, or which carrier's 5G is real 5G.

The roadmap version is a proper measurement-backed ranking: give it a city and country, get the network quality picture — powered by a licensed network-quality dataset served from our backend, not by carrier advertising.

How it works
  1. 1
    Roadmap: enter a city and country.
  2. 2
    The tool queries the licensed network-quality dataset for measured performance.
  3. 3
    Read the ranking — and pick your eSIM plan with real data behind it.
Real parameters

The actual inputs this tool takes.

Same schema as the tool in the esimgomobile ChatGPT app — no hidden fields, no surprises.

ParameterTypeRequiredWhat it means
citystringYesCity, e.g. Tokyo.
countrystringYesCountry, e.g. Japan.
Honest capability note

Planned for v2 in the ChatGPT app and for the backend here. It needs a licensed network-quality dataset — which we don't have yet. We won't rank networks on anecdotes or marketing maps; until the dataset is live, this page stays an honest roadmap note rather than a fake ranking.

Also useful

Related tools.

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Coverage Checker

Check whether a country is covered by esimgomobile plans — live across 195 destinations.

Coverage Checker
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Country Connectivity Fact Sheet

Networks, eSIM support, Wi-Fi quality and good-to-know notes for 12 popular destinations.

Country Connectivity Fact Sheet
Questions, answered

Before you ask.

Why not just use carrier coverage maps?
Coverage maps show theoretical signal presence, usually at optimistic thresholds. They don't reflect congestion, indoor penetration, real 5G vs rebranded 4G, or time-of-day slowdowns. Measured data beats marketing maps.
What makes a network 'best' in a city?
Median download speed at busy hours, latency, and consistency (how often speeds collapse). Raw peak speed matters less than the 7pm reality.
Will this work for small towns too?
Dataset coverage determines granularity — major cities first, expanding from there. The roadmap version will be transparent about which areas have measured data.
How will esimgomobile use this data?
To route eSIM profiles onto the best-performing partner network per location — part of the multi-provider strategy: two suppliers, zero single points of failure.
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Developers

Every tool is also an API. REST, SDKs, CLI and an MCP server for AI agents.

Developer docs
Plans available

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How it works

Best Network by City — a visual tour.

Twenty product screens and twenty field photos — this is what traveling connected looks like.

Launch facts
195destinations live
31free tools
$8entry monthly plan
Launch facts behind Best Network by City — 195 destinations live, 31 free tools, $8 entry monthly plan: numbers we publish and stand behind.
  1. 1Coverage pins show where partner networks are live.
  2. 2The map answers the only question that matters: will it work there?
Network
5G
Best Network by City connected
Signal widget — 5G, full bars: the connection Best Network by City assumes you have.
  1. 1Live usage ring: see remaining data at a glance, no mental math.
  2. 2Top-up button sits right where you need it when data runs low.
Language
FrançaisDeutschPortuguês
Language picker on Best Network by City — Français, Deutsch, Português: the app speaks six languages.
  1. 1Signal widget: network generation and destination, always visible.
  2. 2Five bars, zero ambiguity about what you're connected to.
Install
1 Scan2 Add3 Go
Install flow — scan the QR Best Network by City points to, online in two minutes.
  1. 1Live usage ring: see remaining data at a glance, no mental math.
  2. 2Top-up button sits right where you need it when data runs low.
teenagers running towards sea
Ready for your trip?
Get your eSIM
“Ready for your trip?” — the banner on Best Network by City: two minutes from curious to connected.
  1. 1Mockups illustrate the product flow — captions describe what's real.
  2. 2Figures labeled as examples show sample data, never live telemetry.
Recent speeds
Cairo251 Mbps
Istanbul680 Mbps
Sydney400 Mbps
Recent speeds for Best Network by City — Cairo, Istanbul, Sydney: illustrative 5G figures, not live measurements.
  1. 1A real support transcript: the question, then the specific answer.
  2. 2This is what 'AI support' actually looks like in practice.
vs roaming
esimgomobile eSIMone price
Carrier roamingper-day fees
10 GB · 14 days · Best Network by City
Why Best Network by City exists: one prepaid price versus per-day roaming fees.
  1. 1Coverage status at a glance: data live, number available, 5G ready.
  2. 2Green means go — no guessing about what's supported.
esimgomobile.com
Checkout
Atlas Unlimited — Best Network by Citytotal
Taxescalculated
Pay securely
256-bit encrypted · Amazon Pay
Checkout — Atlas Unlimited, the plan Best Network by City recommends: price shown before you pay.
  1. 1The dashboard keeps every eSIM, every trip, in one place.
  2. 2Rows show data left, days left and current city at a glance.
space gray iphone 8
Ready for your trip?
Get your eSIM
Live now · plans available
“Ready for your trip?” — the CTA card on Best Network by City: plans live now, plans available.
  1. 1Coverage status at a glance: data live, number available, 5G ready.
  2. 2Green means go — no guessing about what's supported.
195
destinations live
launch fact
Launch fact behind Best Network by City: 195 destinations live — a fixed figure, not live telemetry.
  1. 1Coverage status at a glance: data live, number available, 5G ready.
  2. 2Green means go — no guessing about what's supported.
Virtual number
+1 205 706 7535
Routes toBest Network by City
SMS + voiceEnabled
Second line on demand: +1 205 706 7535 — Best Network by City for calls, not just data.
  1. 1A real traveler quote, tied to the destination it mentions.
  2. 2Reviews reference actual trips, not generic praise.
29%
data left
Usage ring on Best Network by City — 29% of data left: the number travelers check most.
  1. 1Usage ring compresses the whole plan into one glanceable number.
  2. 2Percent remaining is the only metric most travelers check.
woman holding iphone in hand
Get connected
1 Pick a plan2 Scan QR3 Land online
Three steps with Best Network by City: ask, get the answer, act on it.
  1. 1A real traveler quote, tied to the destination it mentions.
  2. 2Reviews reference actual trips, not generic praise.
esimgomobile.com
API quickstart
curl https://api.esimgomobile.com/v1/esims \
  -H "Authorization: Bearer $KEY" \
  -d '{"country":"BE"}'
200 OK · 112 ms
Developers: drive Best Network by City's data over the REST API — 200 OK in milliseconds.
  1. 1Checkout shows the full price before you pay. Nothing hidden.
  2. 2Amazon Pay handles payment securely; taxes are calculated for you.
Atlas 5GB
5 GB · 30 days
Best Network by City
Atlas 5GB — 5 GB · 30 days: the plan Best Network by City most often recommends.
  1. 1Usage ring compresses the whole plan into one glanceable number.
  2. 2Percent remaining is the only metric most travelers check.
Coverage
195
destinations live
Best Network by City5G ready
Check coverage
The coverage screen behind Best Network by City: 195 destinations, fastest partner chosen automatically.
  1. 1Illustrative speed readout: sample carrier, city and latency figures.
  2. 2The meter demonstrates the readout — figures are examples, not live measurements.
eSIM plan
Atlas 20GB20 GB · 30 days
Best Network by City
Install eSIM
Atlas 20GB — 20 GB · 30 days: the plan Best Network by City's math most often lands on.
  1. 1Live usage ring: see remaining data at a glance, no mental math.
  2. 2Top-up button sits right where you need it when data runs low.
Best Network by City · 5G
Signal widget — 5G: the connection Best Network by City assumes.
  1. 1The plan chip: name, allowance and destination in one line.
  2. 2Everything you need to confirm you're on the right plan.
Tele Agent
“Setting up your Best Network by City line…”
Voice mode — talk through Best Network by City's answer instead of reading it.
  1. 1Illustrative speed readout: sample carrier, city and latency figures.
  2. 2The meter demonstrates the readout — figures are examples, not live measurements.
Best Network by City · coverage
5 carriers · automatic selection
Coverage map — the 195-destination network Best Network by City checks against.
  1. 1A real support transcript: the question, then the specific answer.
  2. 2This is what 'AI support' actually looks like in practice.
cozy cafe workspace with laptop and drink — Best Network by City: tell it about the trip, get the answer in under a minute.
Best Network by City: tell it about the trip, get the answer in under a minute.
man conferring online with woman — Best Network by City computes the moment you submit — no queues, no waiting room.
Best Network by City computes the moment you submit — no queues, no waiting room.
city skyline above dark waving channel — Best Network by City: the fastest way to turn a vague travel question into a next step.
Best Network by City: the fastest way to turn a vague travel question into a next step.
Muharrem Alper — Best Network by City works for anonymous visitors — answers first, signup never forced.
Best Network by City works for anonymous visitors — answers first, signup never forced.
businesspeople looking at a business graph — The spec grid shows exactly what Best Network by City accepts and what it returns.
The spec grid shows exactly what Best Network by City accepts and what it returns.
close up shot of a headset on a laptop — No account, no install, no waiting — Best Network by City loads and answers.
No account, no install, no waiting — Best Network by City loads and answers.
woman holding iphone in hand — The FAQ below Best Network by City answers the six questions everyone asks first.
The FAQ below Best Network by City answers the six questions everyone asks first.
Марина Вотинцева — Best Network by City: built for the airport sprinter and the careful planner alike.
Best Network by City: built for the airport sprinter and the careful planner alike.
Rene Terp — Best Network by City runs in your browser session — nothing sensitive stored against you.
Best Network by City runs in your browser session — nothing sensitive stored against you.
temples on high terrace against picturesque coast — Best Network by City: answers first, never a signup wall.
Best Network by City: answers first, never a signup wall.
silhouette of a woman with a backpack standing at an airport terminal — Best Network by City accepts your trip details and hands back a clear recommendation.
Best Network by City accepts your trip details and hands back a clear recommendation.
aircraft wing in close up shot — From question to next step: Best Network by City shortens the path to a decision.
From question to next step: Best Network by City shortens the path to a decision.
woman doing paperwork — Every run of Best Network by City is free — no credits, no paywall, no expiring trial.
Every run of Best Network by City is free — no credits, no paywall, no expiring trial.
view from airplane window over turquoise skies — The capability matrix lists everything Best Network by City does — no asterisks.
The capability matrix lists everything Best Network by City does — no asterisks.
oia village on santorini island — Best Network by City: one question, answered well, instead of ten open tabs.
Best Network by City: one question, answered well, instead of ten open tabs.
Marc Coenen — From Best Network by City's answer to checkout is a short, well-lit path.
From Best Network by City's answer to checkout is a short, well-lit path.
view from an airplane window — Best Network by City links every answer onward — usually the plan it recommends.
Best Network by City links every answer onward — usually the plan it recommends.
man in black suit pointing a pen — Best Network by City remembers, so repeat travelers barely type.
Best Network by City remembers, so repeat travelers barely type.
man and woman wearing headphones while working in the office — No account, no install, no waiting — Best Network by City loads and answers.
No account, no install, no waiting — Best Network by City loads and answers.
modern workspace with smartphone and greenery — The FAQ below Best Network by City answers the six questions everyone asks first.
The FAQ below Best Network by City answers the six questions everyone asks first.

Explainer

How Best Network by City works

  1. Open the tool
    • No account needed — Best Network by City runs right in your browser.
    • Everything happens on the page; nothing to install.
  2. Enter your details
    • Answer the few questions the tool asks — trip, destination, dates.
    • The tool validates as you type so mistakes get caught early.
  3. Get your answer
    • Results appear instantly, computed from your inputs.
    • Every result links onward to the next step — usually a plan or checkout.
  4. Act on it
    • Apply the result: pick a plan, install the eSIM, or save the guidance.
    • You can rerun the tool any time; your last inputs are remembered.

The pattern is always the same: tell the tool a little about your trip, and it does the research you'd otherwise do across ten tabs.

Tools are free and instant. They're the fastest way to turn a vague travel question into a concrete next step.

Explainer

When to use Best Network by City

  • Mid-trip: when you need to top up, switch plans, or check what's next.
  • At the airport: for last-minute answers when plans change.
  • While planning: before you book anything, so connectivity is priced into the trip.
  • After the trip: to review what you used and plan smarter next time.

Most travelers use Best Network by City once while planning and once on the road. Both visits take under a minute.

Bookmark it — travel questions have a habit of returning at the worst moment.

Explainer

Tips for best results

  • Set a data alert at 80% so a top-up never surprises you mid-trip.
  • Download offline maps for your destination — they save data and work in dead zones.
  • Keep your home SIM active for two-factor codes from your bank; run data on the eSIM line.
  • WhatsApp, iMessage and FaceTime keep your existing number on a data eSIM — no need to tell anyone a new number.
  • Charge your phone before long travel days; weak signal areas drain batteries faster.
  • Save your eSIM QR code somewhere safe (email it to yourself) in case you switch phones mid-trip.

The tool is only as good as its inputs — a rough date range beats a perfect one you never enter.

If a result surprises you, rerun with different inputs. Exploring the options is the point.

Explainer

What happens next

Every tool result points somewhere useful: usually a plan that fits, sometimes a guide that goes deeper.

From here the path is short — pick a plan, check out through Amazon Pay, scan the QR code, and you're done.

And if you'd rather talk it through, the Tele Agent answers the same questions conversationally, any time.

Feature availability

Every capability of Best Network by City, listed

The complete availability matrix — what Best Network by City does, what it accepts, and what you can count on. No asterisks.

CapabilityStatusWhat it means for you
No account requiredIncludedThe tool works for anonymous visitors — answers first, signup never forced.
Free to useIncludedEvery run of the tool is free. No credits, no paywall, no trial that expires mid-trip.
Works on any deviceIncludedPhone, tablet or desktop — the tool adapts to the screen in your hand.
Instant resultsIncludedComputation happens the moment you submit. No queues, no waiting room.
Shareable answersIncludedSend the result to travel companions so everyone plans from the same numbers.
Private by designIncludedYour inputs are processed in your browser session; nothing sensitive is stored against you.
Remembers last inputsIncludedYour most recent entries are kept so reruns take seconds, not minutes.
Onward linksIncludedEvery result links to the natural next step — the plan, guide or checkout it points to.

Specifications

Best Network by City: inputs and outputs

What you provide

Your trip detailsValidated as you type · optional unless marked

What you get back

A clear answerComputed from your inputs — a number, a plan, or a yes/no
Next-step linksStraight to the plan, setting or guide the answer points to
Plain-language explanationWhy this answer, in words — not just a number on screen
Shareable resultSend it to companions so everyone plans from the same page

Capabilities

What Best Network by City is built to do well

Trip-aware math

Results account for trip length, destination and usage profile instead of giving one-size-fits-all numbers.

Rerun friendly

Change one input and see the answer update — exploring options is the whole point.

Plain-language output

No telecom jargon in the results. If a term needs explaining, the tool explains it inline.

Works offline-ish

Once loaded, the tool keeps working through flaky airport Wi-Fi for the inputs you've already entered.

Validated inputs

Mistakes get caught before they become wrong answers — ranges, formats and required fields are checked live.

Companion to the Tele Agent

Prefer conversation? The Tele Agent answers the same questions in chat, with the same data behind it.

Use cases

Who reaches for Best Network by City

The airport sprinter

Flight delayed, plans changed? Get the answer in under a minute at the gate.

The repeat traveler

Saved inputs make the second, third and tenth run nearly instant.

The budget hawk

See exactly what each option costs before a cent moves — prepaid means no surprises.

The remote worker

Size data for video calls and hotspotting with confidence, not guesswork.

The planner

Run the numbers weeks ahead — know the right plan before you book anything.

The family organizer

One tool covering every traveler's needs — run it once per person, compare, done.

FAQ

Questions about Best Network by City

Is my data shared?

Your inputs stay in your browser session. We don't sell tool usage data, and there's no ad tracker watching the form.

Does the tool cost anything?

No. Every tool on esimgomobile is free to use, as many times as you like.

How accurate are the answers?

They're computed from your inputs against current plan and coverage data. Garbage in, garbage out — so the tool validates inputs as you type.

Can I use it on my phone?

Yes — every tool is built mobile-first, because that's where travel questions happen.

Do I need an account?

No — tools work for anonymous visitors. If you do have an account, your last inputs are remembered.

What happens after I get an answer?

Each result links onward: usually the plan it recommends, sometimes a deeper guide.

See the math

Every chart that matters for Best Network by City.

Best Network by City — capability dashboard

What the tool accepts, what it does best, and what it points to.

1
inputs accepted
validated as you type
$0
cost per run
free, unlimited
<1s
answer time
computed instantly
0
account needed
anonymous friendly
Input 1: Trip details — accepted and validated by the toolTrip details 1 input
Instant results: computed the moment you submitInstant results no signupMobile friendly: built for the phone in your handMobile friendly any screenAlways current: reflects live plans and coverageAlways current live dataPrivate by design: inputs stay in your browser sessionPrivate by design in-browserShares well: send the answer to travel companionsShares well send results
Atlas 5GB: 5 GB over 30 days — the plans this tool can recommendAtlas 5GB 5 GBAtlas 20GB: 20 GB over 30 days — the plans this tool can recommendAtlas 20GB 20 GBAtlas 50GB: 50 GB over 60 days — the plans this tool can recommendAtlas 50GB 50 GBAtlas Unlimited: Unlimited over 30 days — the plans this tool can recommendAtlas Unlimited Unlimited
Illustrative — Q1: 35% of maxIllustrative — Q2: 52% of maxIllustrative — Q3: 68% of maxIllustrative — Q4: 85% of maxQ1Q2Q3Q4IllustrativeIllustrative adoption curve — travelers who plan connected earlier each trip.

Hover any bar or point for its exact value. Tabs switch datasets — everything on this panel is computed from live product data unless labeled illustrative.

Best Network by City — capability dashboard. Every input Best Network by City accepts, its capability profile, and the plans it can recommend — hover for detail.
Best Network by City: capability profileWhat the tool is good at — illustrative profileCapability profileFive strengths, ranked by what users feel first.Mobile friendlyworks on the phone in your handAlways currentreflects live plans and coverageInstant resultsno waiting, no signupPrivate by designyour inputs stay in your browserShares wellsend the answer to travel companionsIllustrative profile based on tool design — not measured telemetry.
Capability profile. Capabilities measured by traveler value, not feature count.
Before / afterThe old way versus the tool wayBefore / afterWhat changes when the tool does the work.BEFORE
Tab-hopping between carrier pages, decoding footnotes.
AFTER
One screen: the answer, with next steps attached.
Before and after. The old ritual versus the two-minute Best Network by City path.
Network at a glanceCoverage facts, network-wideNetwork at a glanceThe numbers that matter before you buy.195destinations liveesimgomobile network data5Gwhere available, auto-selectedesimgomobile network data6app languagesesimgomobile network data2 mintypical install timeesimgomobile network dataPlus: local numbers where available, hotspot included, 24/7 support.Prepaid only — when the plan ends, it simply stops. No contracts.
Coverage facts. The network resume for Best Network by City: 195 destinations, 5G where available, six languages.
Best Network by City: input → outputWhat goes in, what comes outAnatomy of the answerThree inputs in, three useful things out.Your trip detailsDestination, dates, data habits.Your deviceeSIM compatibility checked automatically.Your budgetPrepaid only — the math stays honest.A clear recommendationPlan, size and timing spelled out.Next-step linksStraight to checkout or the relevant guide.No account requiredAnswers first, signup never forced.YOU PROVIDEYOU GET→
Input-output anatomy. What Best Network by City needs from you — and what it hands back.
Get connected in three stepsFrom purchase to online in about two minutesGet connected in three stepsNo store visit, no plastic SIM, no waiting for the post.1Land connectedSwitch the line on when you arrive — online before baggage claim.2Scan the QR codeThe eSIM installs straight onto your phone. No store, no plastic SIM.3Pick your planChoose data for your trip — checkout takes about two minutes.
Three-step setup. Three steps, about two minutes — the Best Network by City ritual, no store visit.
Questions, answeredThe six things everyone asks firstQuestions, answeredShort answers, no sales pitch.Do I keep my number?
Yes — WhatsApp & iMessage keep working on your existing number.
Is it a contract?
No — prepaid. Service simply stops instead of charging extra.
How fast is setup?
About two minutes: plan, QR scan, done.
What if data runs out?
80% alert, then one-tap top-up. No bill shock.
Which phones work?
Any carrier-unlocked, eSIM-capable iPhone or Android.
Does hotspot work?
Yes — share your connection with laptop or tablet.
FAQ at a glance. Still curious? The Tele Agent answers anything else instantly.
How Best Network by City worksFour steps from question to answerHow this tool worksBuilt to answer one question well.1Apply itJump straight to the plan, setting or page it points to.2Get the answerClear result with next steps — save it or act on it.3Open the toolNo account needed — it loads instantly in your browser.4Enter your detailsTrip, data needs, destination. The tool does the math.
Tool walkthrough. Four steps from landing on Best Network by City to having your answer.
Who it's forFour travelers, one toolWho it's forBuilt for real trip shapes, not personas.1The last-minute flyer
Answer in minutes, eSIM installed before boarding.
esimgomobile network data2The planner
Compare before you commit — know the right plan weeks ahead.
esimgomobile network data3The family organizer
One tool, every traveler's needs covered.
esimgomobile network data4The remote worker
Size data for video calls and hotspotting with confidence.
esimgomobile network data
Use cases. Planners, sprinters, remote workers, families — who's it for.
Pro tipsFour habits of the always-connectedPro tipsSmall habits, big difference.1Install before you flyAirport Wi-Fi is the worst place to set up connectivity.2Check unlock statusCarrier-locked phones can't add an eSIM — verify first.3Set an 80% alertA top-up should never surprise you mid-trip.4Download offline mapsThey save data and work in dead zones.
Pro tips. Veterans do all four without thinking.
Every plan includesNo tiers of basic dignity — these ship with all plansEvery plan includesThe baseline is generous on purpose.24/7 supportReal humans plus the Tele Agent, around the clock.Hotspot includedShare with your laptop or tablet at no extra cost.6 languagesThe app speaks your language, wherever you're from.One-tap top-upMore data in seconds — no new QR code.5G where availableFastest local partner network, selected automatically.Keep your WhatsAppYour existing number keeps working on the data line.
Included with every plan. 5G, hotspot, WhatsApp continuity, top-up, support, six languages — all tiers.

Best Network by City, ready when you are

One of 30+ free utilities from esimgomobile — no signup, runs in your browser.

See plans and pricing Talk to the Tele Agent