4g constantly going down to H+ and less.

[Charlotte11]

My 4g has recently started dropping to H+ and then completely.

The same with my phone signal. It was 3+ for weeks, and now it's 1 bar, to dropping off completely aswell.

[jonsie]

Check here

Guide: How can I sort out my network issues? 

We’re just customers like you but it sounds like you’ll need someone to access your account which can’t be done from here. If you message O2 using the links below, they should be able to help you with this

or give them a call on 202  or 0344 809 0202