Inside the O2 Europe Zone, roaming costs nothing extra because your normal allowance applies; outside it, and outside the destinations your plan includes, O2 charges a daily pass or pay-as-you-go rates for each day you use your phone. Our Global eSIM replaces that with one price for the trip, from USD 9.99 for 3 days.
Every day your phone touches a foreign network, a meter can start. Land, connect, go works better when the meter isn’t running.
How much will O2 roaming cost for a week outside the Europe Zone?
About £7 a day, so a week of daily use comes to 7 × £7 = £49. That applies where your plan doesn’t include free global roaming: O2 then charges a daily pass or bolt-on rate of around £7 a day, depending on usage and zone, or standard pay-as-you-go rates if no bolt-on is active.
O2 describes its Travel Bolt On as costing nothing to add, with a fixed, flat rate of £7 each day. It says you’re charged only on the days you use your phone abroad. The daily charge runs from midnight to midnight local time, based on the capital city of the country you’re in.
O2 also says the service has no fixed data allowance, but limits it to 2Mbps to help manage traffic. For calls, O2 says premium rate numbers, MMS and non-standard texts sit outside the daily £7 and bill at standard roaming rates.
What does O2 Roam Like at Home cover in the Europe Zone?
It covers your standard UK minute, text and data allowances, at no extra cost in O2’s Europe Zone. The zone is the EU and selected European countries.
Calling or texting another number within the Europe Zone, or back to the UK, comes out of your regular plan allowance. Nothing extra is added on top.
For a European trip on an O2 plan, that’s the story. The daily charges start where the Europe Zone ends.
Which O2 plans include roaming outside Europe, and where?
Select higher-tier O2 plans include it through the Travel Inclusive Zone, at no extra cost. Those plans are such as O2 Plus, Ultimate or specific Volt bundles.
The zone covers destinations like the USA and Mexico. On Ultimate plans it runs to up to 75 destinations.
If your plan isn’t on that list, or your destination isn’t in your plan’s zone, the daily pass applies. Check your destination against your plan before you pack.
What do 7 and 14 days abroad cost on O2 roaming and on a flat plan?
For 7 days, O2’s daily pass of around £7 a day comes to £49 if you use your phone every day, against USD 19.99 for our 7-day Global plan. For 14 days, our plan is USD 27.99, and the O2 charge keeps building by the day on every day you use the phone.
Currencies differ, so convert at the day’s rate. The O2 pass bills by the day of use. Our plans bill once, by trip length.
Here are all four lengths of our Global plan, with unlimited data:
- 3 days: USD 9.99
- 7 days: USD 19.99
- 14 days: USD 27.99
- 30 days: USD 49.99
Pick your days and go.
What happens if you use O2 data abroad with no pass or bolt-on?
With no bolt-on or included zone, standard pay-as-you-go rates apply: voice calls are charged per minute and data per megabyte. The rate varies by zone, so the bill follows your usage, not your trip length.
For the International Sim tariff, which isn’t zone-specific, O2 publishes its data rate in its Terms & Conditions: Pay As You Go International Sim Standard Rates: “Data | £3/MB up to max £2/day”
Atlas, who is 4.5 billion years old, has watched continents drift and still blinks at a meter that counts megabytes.
The way out is a pass or a flat plan bought before you fly. Then your phone stops being a billing event.
How do you check your O2 roaming cost before you fly?
Check two things: your phone’s Data Roaming setting, and what O2 says about your destination. You can view specific country breakdowns directly via O2 Roaming Help and Support.
O2 also says you can check whether O2 Travel is activated by signing into My O2 before you set off. Apple Support, in About cellular data roaming options for your iPhone and iPad, gives these steps to turn Data Roaming off:
- Open Settings.
- Tap Cellular or Cellular Data.
- If your device has a single SIM card or eSIM, turn on Cellular Data, then tap Cellular Data Options, and turn off Data Roaming.
- If your device uses Dual SIM or Dual eSIM, turn on Cellular Data, tap the number you want to modify, then tap Cellular Data Options, and turn off Data Roaming.
Apple Support, in Use cellular data on your iPhone or iPad, states that if you have an international data plan, you may need to keep Data Roaming on.
Which travel eSIM should you buy for a trip instead of paying O2 roaming?
Buy the one that prices the whole trip up front. We sell one Global eSIM for 165+ countries, with unlimited data at a flat price by trip length.
Airalo sells per country, per region, or as one global plan, priced in USD. Holafly sells per country, per region and as monthly global plans, with Light at 25GB. Saily and Nomad sell per country and per region, plus global plans, by the gigabyte or unlimited. Each publishes its own daily allowance and speed rules, set out row for row below.
| Travel eSIM | How plans are sold | Unlimited plan allowance, as published | Calls, texts and phone number, as published |
|---|---|---|---|
| Maya Mobile | One Global eSIM for 165+ countries, unlimited data at a flat price by trip length: USD 9.99 for 3 days, USD 19.99 for 7 days, USD 27.99 for 14 days, USD 49.99 for 30 days | A daily high-speed data allowance (the Daily Quota) at up to 4G LTE or 5G where local networks offer it, reset every 24 hours; unlimited data at standard speed once the Daily Quota is used | Data only, with no local number; your own SIM stays in the phone for your calls and texts |
| Airalo | Per country, per region, or one global plan; priced in USD | Our unlimited data packages don’t have a fixed total data cap. However, to keep the network running fairly for everyone, when you use more than 3GB in a day, we’ll slow down (or “throttle”) your internet speed to 1 Mbps for the rest of that day. Your full high-speed connection will automatically be restored when your daily allowance next resets. Your daily allowance resets every 24 hours, counted from the time you activated your eSIM. | We offer flexible data packages — some have calls and texts. |
| Holafly | Per country, per region (Europe, Latin America, Cruise plans), and monthly global plans: Light, 25GB of data, $ 49.90USD/month; Unlimited, $ 64.90USD/month; Ultra, $ 90.95USD/month | Unlimited data plans are subject to a fair use policy, which may temporarily reduce speed in cases of unusually high usage to maintain network quality for all users. | Unlimited Plans purchased on November 4, 2025, or later include a phone number for US, UK, or Canada. Please note that this service supports inbound SMS only and VOIP-based calling (traditional incoming cellular calls are not supported) |
| Saily | Per country and per region, plus one global plan; by the gigabyte, unlimited, or both | The Unlimited plan gives you 5 GB per day at full 4G/5G speed, then keeps you online at 1 Mbps for the rest of the day — fast enough for navigation, messaging, and standard browsing. | Yes, you can keep your own number while using a Saily eSIM plan. If you want to make calls and send SMS messages abroad without worrying about extra carrier fees, you can add a US phone number to your Saily eSIM plan. |
| Nomad | Per country, per region and global plans; by the gigabyte and unlimited | Once the daily allowance of 2 GB is used, data speeds are reduced (throttled) for the rest of the day. Depending on the specific plan, this reduced speed is approximately 1 Mbps or 2 Mbps. | Some of Nomad’s eSIMs include a local phone number. Check the plan details for more information of what your plan includes. |
In the table, the rival rows quote each provider’s own wording or briefly summarise it, while the Maya Mobile row comes from maya.net.
How Maya replaces a daily roaming charge with one trip price
Install once. Buy a plan per trip. Skip the daily meter.
Our eSIM is installed once and stays on the phone permanently. For each trip you only buy a new plan, with no reinstalling. One eSIM covers 165+ countries, so there’s no plan to add per country.
Plans come in 3-day, 7-day, 14-day and 30-day lengths, all with unlimited data. The high-speed allowance resets automatically every 24 hours.
Shaun D. gave five stars on Trustpilot on December 21, 2025, about Maya Mobile: “Bought an e-sim to use in turkey. Faultless, great service and good price for unlimited data. Will use again in the near future.”
Pick your days, buy the plan, land and go.
FAQ
Which phones work with the Global eSIM?
Your phone must be carrier unlocked to use the Maya eSIM. To check an iPhone, go to Settings > General > About and look under Carrier Lock. An unlocked device shows ‘No SIM restrictions’; if the field says anything else, the device is locked.
How do I install the Global eSIM before a trip?
You install one Maya eSIM on your device, and it stays permanently installed. There’s no need to delete or reinstall it between trips. For each trip you buy a plan, and the eSIM stays on the phone ready for the next one.
How many countries does the Global eSIM cover?
One Maya eSIM covers 165+ countries. It’s the same eSIM and the same install for all of them.
What happens when my plan’s days run out?
If you leave Auto Top-Up off, your plan simply ends on its expiry date and nothing more is charged. Auto Top-Up is an optional feature that automatically buys the same plan again when the current one expires, and it’s off by default. If you need more days, you can buy another plan from the Maya app.
What is the Daily Quota on the Global eSIM?
Every plan comes with a daily high-speed data allowance, called the Daily Quota, running at up to 4G LTE or 5G where local networks offer it. Once you have used the Daily Quota, data carries on at standard speed until the day ends. The allowance resets automatically every 24 hours.
Which plan covers me on a cruise ship?
The Global + Cruise plan covers 20+ cruise lines and 165+ countries, including Royal Caribbean International. It’s a separate purchase from the Global plan, and it’s priced on its own. It covers Norwegian Cruise Line and Carnival Cruise Line among those 20+ lines.
Maya gives you one eSIM for 165+ countries with unlimited data at a flat price by trip length, so a trip abroad is one purchase.
