Activate new sim with old number

[Miss-beck]

My son got his number moved to another o2 sim afew weeks back and it still has not data or calls 

[MI5 · Accepted solution]

@Miss-beck 

You'll need to call customer service.
Numbers here Guide: Coronavirus Community Help and Support 
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 you have to, to get put through to someone.
8.00am is the best time to call if you can.

[b4u2]

is it still in middle of porting or network signal issue?

[MI5]

After a few weeks?