Do you have a "3" shop locally where you could have it checked out? It does sound as though there could be a hardware fault.
If all else fails, I use one of these "wireless routers" which has so far been reliable click here#
WPA2 hack: How secure is your Wi-Fi?
HP’s new Surface Pro rival is designed specifically for Adobe-using designers and artists
Best kids apps for iPhone & iPad
Que faire si son iPhone ou iPad est tombé dans de l'eau ?