If you want to keep using your phone the way you do at home while abroad, it pays to have your eSIM sorted a few days before you leave. In short, there are five things to take care of before departure: 1) check that your device supports eSIM, 2) choose a plan that fits your destination, data needs, and trip length, 3) install the eSIM before you go, 4) understand that it's data-only and plan how you'll stay in touch, and 5) know what to do if you can't get online. Work through them in this order and you won't be scrambling once you arrive. The setup itself only takes a few minutes if you follow our eSIM setup guide. Let's start by going through the checklist below from the top.
- Get your eSIM ready a few days before departure for peace of mind
- First confirm your device supports eSIM, and unlock it if needed
- Choose a plan based on destination, data amount, trip length, and whether it's unlimited
- Install while you still have Wi-Fi, and activate once you arrive
- It's data-only, so there's no phone number for calls or SMS, but app-based calls like WhatsApp can still work
Pre-Departure eSIM Checklist (Quick Reference)
Before the details, here's the big picture in one table. Keeping an eye on the "when" makes preparation much smoother.
| Task | Suggested timing | Where to check |
|---|---|---|
| Check that your device supports eSIM | Before buying | Compatible device check |
| Choose a plan by destination, data, and days | A few days before departure | eSIM comparison page |
| Install the eSIM | Best done before departure, on Wi-Fi | Setup guide |
| Plan how you'll stay in touch (it's data-only) | Before departure | Covered in this article |
| Be ready in case you can't connect | Know it before you go | Troubleshooting |
If you'd like a fuller walkthrough of the whole setup process abroad, take a look at our complete guide to setting up an eSIM abroad as well.
[Check 1] Confirm your device supports eSIM
The first step is to confirm that your phone supports eSIM. A device that doesn't support it simply can't use an eSIM, so checking this first saves you from wasted effort.
An easy way to check
- iPhone: Most models from roughly the iPhone XS onward are supported. A quick test is to go to Settings → General → About and see whether an "EID" is listed.
- Android: Support varies by model. Check whether the SIM or mobile network section in Settings includes an "Add SIM" or "eSIM" option.
Also keep in mind that a carrier-locked phone may not be able to use an eSIM from another provider, so if needed, have your current carrier unlock it before you travel. You can check model-by-model compatibility on our compatible devices page.
[Check 2] Choose a plan by destination, data, and days
Once your device is confirmed compatible, the next step is choosing a plan that matches your trip. There are four things to weigh: destination, data amount, number of days, and whether you want unlimited or a set amount of data.
How much data you might need
- Light use, mainly maps, social media, and messaging: Around 1GB a day is often enough.
- Plenty of video streaming or tethering: Consider a more generous data amount, or an unlimited-style plan.
If you're not sure how much you'll use, our eSIM comparison page lets you line up data amounts and trip lengths side by side and filter by country, data, and days to make the choice easier. If you want plenty of headroom, the unlimited plan (Bloomy Unlimited Max) is worth considering too.
Note that an unlimited plan does not mean usage with no limits whatsoever. A fair use policy, reduced speeds after a certain amount of data, and tethering conditions may apply, and these vary by plan. While such plans suit longer periods of use, actual speeds and conditions also depend on the local network, area, and congestion, so please check the latest details before you buy.
[Check 3] Install your eSIM before you leave
It's best to install your eSIM before departure, while you still have Wi-Fi. That way you avoid situations like arriving and being unable to display the setup QR code because you can't get online.
The general flow
- Buy a plan and receive the QR code / setup details by email or in your account.
- While connected to Wi-Fi, follow the instructions to install the eSIM (add the profile).
- Activating (turning on) the line is generally done after you arrive at your destination, following the plan's instructions.
The key is to think of "installing (before departure)" and "activating the line (on arrival)" as two separate steps. Activation timing differs by plan, so always check the instructions provided when you buy. Step-by-step details with screenshots are in our setup guide. You can check your purchased eSIMs, QR codes, and remaining data anytime from your account.
[Check 4] Remember it's data-only, and plan how you'll stay in touch
One thing that's easy to overlook in your prep is how you'll stay in touch. Bloomy plans are data-only by design. That means you don't get a new phone number, and you can't make voice calls or send and receive SMS on such a number.
That said, as long as you have a working data connection, app-based calls and messaging through services like WhatsApp can still work. It helps to prepare your communication like this:
- Staying in touch with family and friends: confirm your contacts in advance in apps such as WhatsApp.
- If you need SMS verification from a bank or other service: separately arrange a way to receive SMS on your existing number (for example, keeping your original line active or using roaming).
- If voice calls are essential for something: also consider another option such as a plan that includes a number, or a local SIM.
Dividing the roles, "data on the eSIM, number and SMS handled separately", makes it much less likely you'll get stuck while traveling.
[Check 5] Know what to do if you can't connect
Just in case, get a rough idea before you leave of what to do if you can't get online. In most cases, the following checks resolve it.
- Toggle airplane mode off and on once, or restart your device.
- Check in Settings whether "data roaming" is turned on (it's often required for an eSIM used abroad).
- Make sure the line used for mobile data is set to your purchased eSIM.
- Try moving to a spot with a better signal.
If that still doesn't help, the steps are gathered on our troubleshooting page. Bookmarking it ahead of time means you can handle things calmly on the ground.
Getting ready and getting support with Bloomy
Bloomy is built around making sure first-time eSIM travelers aren't left guessing, from before purchase right through to after arrival. Choose by destination, data, and days on the comparison page, get set up with the setup guide, and check your remaining data in your account while traveling, so you can turn this pre-departure checklist straight into action. If you run into trouble, our contact page and FAQ are there to help.
Plan contents, supported countries, and unlimited conditions are subject to change. Always check the latest details before you buy.
Summary: Work through the checklist from the top
Pre-departure prep comes down to five steps: 1) check your device, 2) choose a plan, 3) install, 4) sort out how you'll stay in touch, and 5) be ready for trouble. Nothing here is difficult, and working through it from the top a few days before you leave is plenty. Next, start with checking device compatibility, and if all's well, move on to choosing a plan for your destination. Get everything ready and travel with confidence.
