Tools
Answer the question before you buy.
All free, no account needed, and they work whether or not you buy anything from us.
Data calculator
Tell us the trip and what you do on your phone. We tell you how many gigabytes, using real consumption figures rather than a guess.
Roaming rip off calculator
What your home carrier would charge for the same trip, by carrier and country. The number is usually worse than people expect.
eSIM compatibility checker
Find your exact model across 67 devices from 7 manufacturers, with the install steps for that phone.
Coverage explorer
Measured speeds by country and carrier, with sample sizes. Embeddable.
Bank code troubleshooter
Work out why your verification code is not arriving, and which of the three fixes applies to you.
Travel speed test
Check what you are actually getting right now, and contribute it to the coverage dataset if you want to.
6
Calculators, none of them behind a sign up
67
Phone models listed, from 7 makers
75,333
Speed readings behind the coverage figures
145
Destinations with a measured median
Which one to open first
If the trip is not booked yet, start with the roaming cost calculator. It puts what your own carrier would charge beside the Orbislo price for the same days, and that comparison decides whether you need a travel eSIM at all.
If you fly tomorrow, start with the compatibility checker instead. Everything else here is fixable at the gate. A handset that cannot take an eSIM is not, and the check takes about ten seconds.
If you have already bought and something is broken right now, skip both. Go to the bank code troubleshooter or the speed test. Both are diagnostic, both work on a connection that barely works, and neither asks you to buy anything first.
Pick the tool by where you are in the trip
| Where you are | Open this | What it settles |
|---|---|---|
| Deciding whether to bother at all | Roaming cost calculator | What your own carrier would charge for these exact days |
| Working out what to buy | Data calculator | How many gigabytes, from measured consumption |
| Worried the phone is too old | eSIM compatibility checker | Yes or no for your model, and its quirk |
| Choosing between two destinations | Coverage explorer | Median and tenth percentile speed, with sample counts |
| Landed, and the bank code has not arrived | Bank code troubleshooter | Which of the causes is yours, in three questions |
| Connected, and it feels slow | Travel speed test | What you are getting against the country median |
Speed figures come from 75,333 passive readings over a rolling 90 days across 145 destinations. Roaming day rates are published list prices for the standard consumer pass.
How many gigabytes does this trip need?
The data calculator answers that one. It needs the number of days and what you do on your phone, then works from measured consumption rather than a marketing table: maps at about 5 MB an hour, social feeds at about 300 MB an hour, streaming at 1 to 3 GB an hour. It will not tell you what you used last year, because it cannot see your bill. It assumes about 450 MB a day and lets you push that.
What would my own carrier have charged?
The roaming cost calculator answers that one, for 14 named carriers across the United States, the United Kingdom and the European Union. It needs your carrier and your destination, and returns the published day rate beside the Orbislo price for the same trip. It will not quote your personal contract. Carriers move these rates by tier and by promotion, so check your own account before you rely on the gap.
Does this phone take an eSIM at all?
The compatibility checker answers that one across 67 models from 7 makers. It needs your exact model name, and returns yes or no in the first line, how many profiles that handset stores, how many it runs at once, and the quirk on that model. It will not know whether the handset is carrier locked, and no list on the internet can. That answer lives with your operator.
How fast will it be where I am going?
The coverage explorer answers that one for 145 destinations. It needs nothing from you, because it is a table you sort by median, by the tenth percentile that describes a bad moment, or by sample count. All 157 upstream networks are named rather than called a local network. It will not predict your hotel room. These are country medians from 75,333 passive readings over a rolling 90 days.
Why is my bank code not arriving?
The bank code troubleshooter answers that one. It needs answers to three questions, then stops on the single fix that matches you instead of handing you the list of nine tips the rest of the internet hands you. Usually the home line was switched off, or wifi calling was never turned on before the flight. It will not receive the code for you: no travel eSIM carries your home number, ours included.
What am I actually getting right now?
The travel speed test answers that one. It needs about 3 MB of your data and ten seconds, pulls a payload of random bytes from this server, times it, and puts your result beside the measured median and tenth percentile for the country you are in. It will not measure latency or upload, and latency is often the real problem when a good download figure still feels broken.
What none of the six will do
Questions people actually ask
Do I have to buy anything to use these tools?
Which tool should I use first?
How accurate is the data calculator?
Where do the roaming day rates come from?
Can I use the coverage figures on my own site?
Do the tools read anything off my phone?
When the tools have answered the question
The wallet starts at $5.89 for 1 GB and falls to $1.36 a gigabyte at 50 GB. Gigabytes do not expire, which is why the calculator telling you to buy slightly under is safe advice rather than a sales line.