on 30-06-2020 23:26
on 30-06-2020 23:33
on 01-07-2020 00:33
on 01-07-2020 00:33
Have a look at this guide
https://www.o2.co.uk/help/phones-sims-and-devices/how-to-keep-your-mobile-number
As it's urgent, if you are able to call O2, then do so by contacting them on any number in this guide
Guide: Coronavirus Community Help and Support
Veritas Numquam Perit
on 01-07-2020 07:15
on 01-07-2020 07:15
Your old Tesco SIM will still receive calls so everyone will be able to call you on that until the number is transferred to your O2 SIM.