@Jc-1
No you cant, if you are changing number due to spam etc then you need to call 202 from your o2 phone or 0344 809 0202 from any other phone.
For porting then you need to follow this guide and note the online form is currently offline Guide: Migration & porting into O2
- Xperia 1V - o2 and Spusu
- Pixel 8 Pro - o2 and Vodafone UK
