on 12-08-2019 10:26
on 12-08-2019 10:51
All faults or maintenance can be found here https://status.o2.co.uk/
That is all O2 tell us.
on 12-08-2019 11:38
on 12-08-2019 11:46
on 12-08-2019 11:46
on 13-08-2019 07:42
on 13-08-2019 07:42
on 13-08-2019 18:31
Probably of limited value if you wish to tether, but some places offer better 3G performance at times than 4G - too many people using the 4G signal.
If your account and tariff permit tethering, then it's worth setting your phone to 3G/2G/Auto rather than the default (4G/3G/2G/Auto) setting under SIM and Network.