I'm in Japan with my Nokia 6.1, running Android 10. My service provider is o2 (in the UK).
I've done everything I can find to disable data while here:
- Settings / Network & Internet / Mobile network / Mobile data: OFF
- Settings / Network & Internet / Mobile network / Roaming: OFF
- sent o2 a "NOTRAVEL" SMS on their 23336 number
I can no longer find my "Data roaming" option, but believe I have also turned it off.
Nevertheless, when my wi-fi fails, my phone has been switching to data over 4G, incurring hundreds of pounds of charges. I have therefore selected "2G" for "Preferred network type". o2 are not helpful.
Is there a simpler way of killing data over the phone networks? If it's "Data roaming", where should that option be?