Mobile coverage has been awful since upgrade?

[Stuart92]

Hello,

I have been with 02 for quite a number of years and treated myself to an upgrade via a third party site. 

Once my new phone was dispatched I got the texts from 02 to confirm I had upgraded and that all had been processed. 

As soon as I received these texts on my old handset, my signal disappeared for a full day. I thought this was purely down to upgrading and changing phones however signal returned on old handset now and again until I got my new phone and I thought this would fix it.

Fast forward to having my new phone about a week now and I have had nothing but signal issues to the point that my iphone 17 is losing 15% battery a day due to ‘no mobile coverage’

Has anyone experienced this or is there anything I can do? I never had issues until upgrading.

Thanks!

[MI5]

@Stuart92 

Use app to check and report any network issues https://www.o2.co.uk/apps/my-network

Guide: How can I sort out my network issues? 

Guide: How to find help & contact O2 to get account checked.

[pgn]

Have you moved the SIM card from the old phone to the new one, @Stuart92?

Or if new SIM is an esim, eSIM - How to activate