Calling from the USA

From 2023, you’ll be unable to use your UK mobile phone to make regular calls when visiting the USA because of changes to their mobile networks. However, you’ll be able to use your phone to make calls using the 4G network – provided you have a compatible phone.

Follow the steps below to check whether your phone is compatible or take a look at this list of compatible devices.

Step 1 - Find your IMEI number

phone screen


The International Mobile Equipment Identity (IMEI) number is a unique 15-digit code that precisely identifies your mobile phone.


Key *#06# into your phone keypad.


This will reveal a series of numbers, one of which is labelled IMEI.


phone screen


Make a note of the first 8 digits of the number, in this example that would be:




You can also find your IMEI number in the settings on your phone.


Settings for iPhone

Go to Settings > General > About. The IMEI number is listed in a section called PHYSICAL SIM. Make a note of the number or use the copy function on your phone.

Settings for Android

Go to Settings > More > About device > Status. The IMEI number is listed along with other information about your phone. Make a note of the number or use the copy function on your phone, if it has this capability. 

Step 2 - Check your IMEI

Enter the first 8 digits into the field below. Or you can copy and paste the full number from the settings on your phone.

IMEI number
Not enough digits have been entered. Please check and try again.
This number is not recognised. please double check the digits you have entered are correct and try again
Alert image
Your device is . This is compatible with 4G Calling abroad.

Step 3 - Set up 4G Calling abroad

Click the link corresponding to your phone model to find out how to set up 4G calling abroad.

iPhone setup

Samsung setup

Sony setup

OnePlus setup

HTC setup

Google setup

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