on 01-09-2018 10:07
Not sure why. They may be working on a mast nearby. Have you checked your network status here ?
Other things to try are in this guide https://community.o2.co.uk/t5/How-to-Guides/How-can-I-sort-out-my-network-issues/ba-p/1014088
on 01-09-2018 15:21
@06carloss If the signal problem is constant, make sure your phone is unlocked, and try the Pay & Go sims from the other providers. If you find an improvement with one, then it's probably time to switch networks.