The phone is fine ... He's done a "geriatric fat thumb" on it and we can't reverse engineer exactly what that was
I bought a box from EE that plugs into the router a couple of years back. It uses the WiFi signal to give me full signal in the house. Retail was about a hundred quid but if you complain about your signal and threaten to change supplier they'll give you 80% off! I paid £18. Recently switched to BT (who now own EE) and they said the box wouldn't work anymore and that I'd have to pay to get my phone unlocked. Well happily that was *****. Phone and box still work perfectly
So how would that have come about? ... and why just that phone as opposed to his laptop or apparently any other device? I've been suggesting he at very least get a new router from Sky as he's still using the original O2 one from before the buy out (although the problems didn't start until well after the change over) .........
There used to be O2 SIMS that only worked with 2G .. i remember having to get a new sim to go with 3G on O2.. The giffgaff one is probably the 3G one.
He probably clicked on "forget" while looking at the wifi settings for his home router. If you are lucky you can press the WPS button on the router and then it tells the phone the password using WPS. Or you need to reenter the password.. Or he has a router provided with a contract that has been automatically upgraded and it now needs a password , when before it was just a sinkhole for all the local kiddies surfing dodgy stuff cos it had no password ..
Ah, well, yes, we've been around the houses with re-sets , passwords, WPS buttons etc etc ... Trust me it's a weird one! Think the router blocking the phone sounds most likely at the momemt ... I'll probaly try all that one more time anyway next visit then get on to Sky for an up to date router, or get him.to change provider anyway