Data

[Njzjz]

My data in los angles is not working.  I paid £25 pounds

[pgn]

Manually search for another network, even one that says "forbidden", @Njzjz 

Also check your APN  is set to "mobile.o2.co.uk" after ensuring data roaming switch is enabled on your phone.

[pgn]

Actually, as you are PAYG, you will not be able to use roaming in USA due to O2 not having 4G WiFi calling on PAYG, @Njzjz - buy a local SIM for data and use WhatsApp. Good luck.

USA - Roaming with O2