Current contract ends in April

[STRUTH]

I don't want to upgrade my phone once my contract ends in April I just want to continue under just pay and go I think it is. How do I go about this?

[jonsie]

You need to contact O2.
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.

[MI5]

@STRUTH 

Switching your number from Pay Monthly to Pay As You Go

We can take care of moving your number and even arrange for your new Pay As You Go sim. Get in touch by calling us on 202 free from your O2 phone, or on 0344 809 0202 from any other phone. We'll do the rest.

If you're on O2 Refresh you can only move to Pay As You Go once your Device Plan is paid. If you're not on O2 Refresh but still in your contract minimum term, you might need to pay a termination charge, and our Customer Service team can talk this through with you. You’ll receive your final Pay Monthly bill 14 days after you move to Pay As You Go. You’ll need to settle any outstanding balance.

https://www.o2.co.uk/help/device-and-sim-support/how-to-keep-your-mobile-number