Error 50: texts/calls not working

[molly14]

Hey! I got a pay as you go O2 SIM recently in the UK and all was working fine. I have just arrived in Spain and my data and roaming is working but I can't make any calls and every time I sent a text it says I can't sent them - error 50. As I am in Spain for a while I cannot access a shop and cannot call for support, however I really need a working phone. I have turned off and on, played about in the settings with no luck, but all online advice says to contact provider. Any help would be greatly appreciated, cheers. 

[MI5 · Accepted solution]

@molly14 

Some things to try:

1 - Reboot phone.
2 - Manually search for a different network
3 - Check with O2 for any roaming bars.
If you message O2 on Facebook (https://o2uk.co/O2CFB) , Twitter (https://o2uk.co/O2CTW) or Instagram (https://o2uk.co/O2CIG) , they should be able to help you with this.

[pgn]

In addition to the checks above, once you can make calls, check that your SMS Service Center number is set correctly for PAYG, with the leading +44 as shown in the guide here, @molly14 - Guide: Text Message Tips (not sent or received)