Well i too am having the same issues, iPhone worked fine for a number of days, then realised it wasnt connected. Did all the usual tests, restores, firmware restores blah blah blah and finaly rang Apple just to see what they said since so many people are having this issue. They tried to take me through all the restores again and what not and said it wasnt a known issue with the 4S and the only issue they do know of is the one with the battery's. Well i think there's a gross oversight here and there is quite clearly an issue.
After asking me to check the phones IP address and i told him the wifi options were greyed out and it said N/A in the IP window he finaly said yes there was a hardware issue and it needs replacing.
Luckily i'd already spoken to my mobile network and they've said i can go and get a replacement back at the shopi got it from, but judging from the number of people who have had numerous replacements im not too optimistic.
I still cant believe Apple have not responded to this issue or even acknowledged it as a fault.
Mr. Jobs must been spinning in his grave 😟
Message was edited by: Ross82
Just out of curiosity, is there any trend to the model of phones with issues, mines the 64GB for instance.