phone calls cut off when other person answers

[Alexpoulter198]

hi i would like to find out why i am unable to make ore receive phone calls for example i try to ring a friend and when they answer the call suddenly ends i was able to make and receive calls yesterday and the o2 network tracker says there are no issues in your area.

I have tried all the options available to rectify the issue ialso put my partners sim into my phone and it lets me call out from his sim.

[MI5]

@Alexpoulter198 

You need a new sim.

Pop into your local O2 store with photo ID or call customer services.
You can use Skype to call if no other phone.
Guide to using Skype: Guide: A Guide to Skype 
Call 202 from any O2 mobile or 0344 809 0202, 0800 902 0217 or 0800 032 1402
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.
Say 'Upgrade', 'Lost/Stolen', or 'Fraud' if the suggestion above doesn't get you through.
Best time to call is 8 am.
You can also reach O2 via social media:
Facebook (https://o2uk.co/O2CFB), Twitter (https://o2uk.co/O2CTW), or Instagram (https://o2uk.co/O2CIG)

[Alexpoulter198]

i have tried a different sim and still can't make or recieve calls but i can through my phone

[madasaf1sh]

@Alexpoulter198 

You need to contact o2 to get a new sim for yourself as you have been advised, there is nothing else anyone here can do to fix the issue.