Phone cuts out when call mobile or land line numbers. Currently in USA.

[JanetFRC]

I have roaming set up, come to the USA frequently, suddenly phone only working on wassap.  Will not connect any other calls.

I can't call EE for hel - 'cos phone wont connect.

[JanetFRC]

Ive looked up a network settings reset and am a bit anxious I won't be able to reconnect afterwards.  I know it's just passwords

but I need the phone for work and I'm scrping by at the moment on whatsapp - I'm fearful to lose anything else.

[Ali_A]

@JanetFRC 

Do you have access to an alternative device to briefly test your SIM card in for calls? 

Ali