How to avoid data roaming charges on your Samsung
Temporarily disable your phone number
Stay connected with prepaid eSIM data
Samsung roaming settings for travel
Your Primary SIM should be off
If you aren’t going to be using your regular phone number while travelling, it’s best to switch it off entirely to avoid unwanted fees for individual calls and texts that occur in another country.
Settings > Connections > SIM card manager > Look for your Primary SIM > Toggle it OFF
Your eSIM should be on
Your eSIM needs to be toggled on in order to provide you with data. (Some Samsung devices might find this setting under “Mobile Networks” instead.)
Settings > Connections > SIM card manager > Look for your eSIM > Toggle it ON
Your eSIM should be your Preferred SIM
You need to tell your Samsung phone to use your eSIM (aloSIM) for all data usage, making it your “Preferred” or “Primary” SIM, depending on your device.
Settings > Connections > SIM card manager > Preferred SIM (or Primary SIM) > Select aloSIM and confirm you want to use it
"Data roaming" must be toggled on
Your eSIM needs to be able to “roam” on new networks get data in a new country, so make sure “Data roaming” is on when you’re using an eSIM.
Settings > Connections > Mobile Networks > Toggle “Data Roaming” ON