I upgraded from text and web to the above this afternoon using live chat and a guru. Everything gone fine and am now on the new tariff as My O2 App shows. However my Sony Xperia Z3 Compact phone still only shows H+ for mobile data and not 4G. I have obviously gone into 'Settings' and ticked in mobile networds 4G(preferred)/WCDMA/GSM etc. and then re-started my phone but nothing changed.
Another quick online chat suggested I remove and re-insert the SIM card but wasn't then sure whether the phone should be off or instandby etc.
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Phone should always be off if you remove the sim but are you sure you are in a 4G area too?As they say, in Sweden - Absolut. I'm in Bromley Borough South London and coverage checker showed strong signal indoors and out.
There maybe congestion on signal as you are in a big city, your phone will latch on to the strongest signal it can find which in your case is not 4G
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