Phone Sim not working on my new phone

[Adam18]

Hi, I have received a new mobile phone and SIM to replace my lost device. I have inserted the SIM, however, it does not connect. I have taken it out a few times and re-inserted it, but it still does not function.

[MI5 · Accepted solution]

@Adam18 

You need to contact O2 to remove the bar from your account and to activate the sim.
All numbers are in this guide Guide: Coronavirus Community Help and Support 
When you call, you will be asked for 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.
You can also try saying "Upgrade" or "Fraud" to be connected to an advisor.
8.00am is the best time to call if you can.