Here is my problem. I upgraded to OS 4.5 with sprint. Since the upgrade I have lost the ability to force my phone to roam. My work has Verizon repeaters in the facility, so when I would get to work I would go to manage connections-> mobile network option-> network selection mode-> roam only. Now in 4.5, I have only sprint or automatic. Now my phone is constantly searching and switching between trying to find sprint and roaming. Can anyone help?