The quickest answer is to check your own phone. Look in your settings for an EID, the number that shows a phone supports eSIM. There's also a device checker on the plan page when you order, so you can confirm before you buy.
The model lists further down are a rough guide for when you're shopping or checking a phone you don't have in front of you. Treat the checks above as the real answer, since eSIM support varies by where a phone was sold.
The check that always works
Open Settings, then General, then About on iPhone, or Settings then About phone on Android, and look for an entry called EID. If it's there, your phone supports eSIM. On most Android phones you can also dial *#06#, which shows your IMEI, the number that identifies your phone, and on eSIM capable phones your EID underneath.
Use this check rather than the lists below whenever you can. Within a single model name there are versions with eSIM and versions without.
iPhone
iPhone XR, XS and XS Max, iPhone SE 2020 and 2022, and every iPhone from the 11 through to the 16 line, including Plus, Pro and Pro Max models.
Your iPhone also needs iOS 14.1 or newer, which you can check under Settings, General, About.
Samsung Galaxy
Galaxy S20 through S24 including Plus and Ultra models, Galaxy Note20 and Note20 Ultra, Galaxy A35, A54 and A55, the Z Fold and Z Flip lines, and Galaxy Xcover7.
Important exception: US versions of the Galaxy S20, S20 FE and S21 don't support eSIM, even though the same models sold in other countries do. Check for an EID before you rely on it.
Google Pixel
Pixel 3 and 3 XL, Pixel 4 and 4a, Pixel 5 and 5a, Pixel 6, 6a and 6 Pro, and Pixel 7 and 7 Pro.
Two things that catch people out
- Your phone has to be unlocked. A locked phone won't accept an eSIM profile even if the hardware supports it.
- eSIM support varies by the country a phone was sold in, not just by model.
If your phone isn't on the list
Newer models released since this list was written are very likely to support eSIM. Run the EID check. If your phone genuinely has no EID, it isn't one you can use to join Flex Mobile.