wifi is a different fault I think, I've definitely noticed the 3G one the past couple of weeks though.

im on o2 aswell...

im just on regular o2 but ive done a search on google and few people have had the problem, and some people have actually been given a new phone due to a fault. but its not that i dont have signal, its just if i lose 3g etc it wont automatically reconnect to it, until i airplane mode it, same with wifi dropping or being slow aswell

This has been happening for me recently actually didn't thing much of it.

On O2 (giffgaff)

I only just realised I've had my 3G off for the past few years :lol:

i kept getting this the other week, or i'd have good wifi signal and no of the apps would update, had to do the airplane mode and back again then it would do the same again 5 mins later, seems ok now though :boggle:

my signal on my 4s has been dropping off during a phone call for no reason, wifi is fine though

basically, at home i usually have really good 3g signal, do most place actually, but have noticed sometime when i lose 3g connection it shows the little E, but if i go to airplane mode and then turn it off again, ill have 3g signal even though i havent left the spot i was in before. also keeps dropping wifi signal aswell, and sometimes acts really show aswell whilst connected