I have the same problem, my wife and I both have this phone, mine has been fault free but my wifes phone is useless. No wifi in the house or at any hotspots, very poor network connection and getting worse. I have tried everything that Sony recommended, turn on and off Wifi, turn on and off phone, network reset and even software repair. None of these solved the problem for more than an hour or so. I can only assume, going by the volume of complaints on line that this phone is a dud. So now what I need to know is how to go about getting it replaced.