Spain

[Mikeaber]

Why can't I call the UK from spain 

[XRaySpeX]

Are you on contract or PAYG? Had you used that SIM for making calls or texts in UK before you left to go abroad?

If you are on contract, did you activate roaming on your EE a/c before you left UK by texting ROAMING to 150? Having a roaming billing add-on doesn't of itself activate roaming on your a/c. Having roaming activated on your EE a/c, not just on your device, is crucial to using your contract SIM abroad.

Often just rebooting the phone is the simple remedy. Also try selecting a network manually rather than auto. Otherwise you need to call CS to get your roaming activated. Try calling CS on the Freephone no. in my sig. on Skype over WiFi. It should be free.

[bristolian]

Does your phone show a connection to any Spanish mobile networks? That's needed to make or receive calls, send or receive text messages or use mobile data.

[Mikeaber]

Can't remember if I activated roaming before I left and have tried manually selecting a Spanish network and tried calling cs but can't call so none of the above worked 

[bristolian]

Regardless of any billing add-on, your ability to get coverage abroad (which calls, texts & mobile data rely on) is dependent on roaming being activated - which allows your phone to connect to foreign networks.

On pay-monthly, this needs to be enabled manually - usually by texting ROAMING to 150 before leaving the UK. Did you do this?

If you now find yourself abroad without having enabled roaming, your only recourse will be to contact CS to request it activated. You can either contact +44 7953 966150 from another working phone, or +44 800 0798586 using a web-calling app such as Skype over WiFi.