PHone calls dropping out

[doctorking]

Over the last couple of weeks I have had several calls drop out at various stages during the call; I am sure I have had good signal at the time. The line will go quiet all of a sudden then it will beep beep beep and cut off and say call failed. I have checked the signal checker and it is supposedly fine in my area. I have turned my phone off and on, chosen O2 manually (already on it). Not sure what else I can try?

[MI5]

@doctorking 

Pop in store with photo ID and get a free sim swap to see if it helps.

[japitts]

A manual network selection will make no difference to dropped calls, if you're already on the same network. If anything, it would make problems worse in poor coverage areas - if you experience a loss of service, your phone will not automatically reselect, but would need manually doing so.