Sim only

[Mcgon69]

If i but a new sim contract via Uswitch (but with O2) can i keep my number that im already using?

[jonsie]

Yes, it will direct you to O2 to complete the contract

Choose UPGRADE to keep your number

If you now have 2 contracts ask O2 to migrate your number

Guide: Migration & porting into O2 

Guide: How to find help & contact O2 

[jonsie]

Using USwitch

https://www.uswitch.com/mobiles/compare/sim_only_deals/o2/

Choose the deal you want

This will automatically redirect you to the O2 website

Just follow the prompts and choose the UPGRADE option

Complete the deal and nothing on your account changes except the tariff at the new cheaper cost

Payment date is the same and your next bill will be at the cheaper rate and will be made up of the pro rata cost of your old tariff and your new tariff

The change should show in My O2 within 24 hours

Volt benefits will still apply as will possibly a 3 month extra such as Disney+