My 4 can see home wifi but won't use it without restarting
I have wifi at home and at work. Many times when I come home, my 4 will automatically connect to my home wifi, but seemingly won't use it without restarting the phone. I tried going into the network settting and did the reset and went and re-entered the wifi passwords for home and work; and soon after displayed the same bahvior. Work wifi doesn't bother it. My 4 didn't aquire this problem until OS6 and still does it under 6.0.1. Turning off the phone's wifi and back on doesn't help. Renewing lease on wifi doesn't help. My wife has the same phone on the same wifi and the same time and it does'nt do this. She doesn't have wifi at work.
Sometimes I get very sporadic an limited data, could be using 3G. After phone restart the phone is fine until another day when the problem returns. I've tried turning ap's off but nothing helps but a restart.
iPhone 4, iOS 6.0.1