Iphone 3g coverage wont work after the long rest of using data

[chichi14]

Hello guys, I just want to know if it is normal that 3g wont work after a switch to dual mode? I'm doing that to eliminate unnecessary data consumption and faster battery consumption. When I am about to use the 3g I need to reset my phone by long pressing the lock key and reopen it again.

 

[Darkstar2007]

Moved thread to appropriate forum.

iPhone 4 16Gb 4.2.8 (jbme 3.0) Moderator @ iPhoneforum staff