incoming calls

[elizabeth2]

My incoming calls are randomly missed.  Some are successful, others log as missed call.  Guru spent an hour in O2 shop trying everything eg changing sim, rebooting network, latest software, ring from landlines, and different mobile phones, some come through, others are logged as missed.  I have iphone SE.

thanks, elizabeth

[Bambino]

@elizabeth2 Check to see if there are any mast issues in your area: https://status.o2.co.uk/

If there are no signal problems, call customer service in the morning and ask them to reprovision your account. All numbers are here: Guide: Coronavirus Community Help and Support 

Because you're not buying anything, O2 won't consider your call important, so use the Lost/Stolen or Fraud option if you have to, to get through. Otherwise you'll just be disconnected.

Alternatively, below is the advice from an O2 Guru on how to get through.
Call 202 from your mobile.
When it comes to the reason you are calling, stay silent for 15 seconds and you will be taken to the keypad options.
Press 2 for Everything Else
Press 5 for More Options
Press 7 for Anything Else which will put you though to someone.

Edit: I've also looked for other possible solutions:

http://www.iphonehacks.com/2020/04/iphone-calls-straight-voicemail-how-fix.html

https://support.apple.com/en-us/HT204027

https://www.businessinsider.com/why-does-my-iphone-go-straight-to-voicemail?op=1

[elizabeth2]

Thx so much for quick response. I’ll try everything you have listed!!

[MI5 · Accepted solution]

@elizabeth2 

Try dialling ##002# to cancel all diverts. 

[elizabeth2]

Have just done it. It seems to be a long list erasures?

[MI5]

They are all voicemail diverts @elizabeth2