Originally Posted by I8UB4
Does the SIM card need to be in the phone when upgrading the OS to 4.5? Since it seems to take a while, I thought it would be good to put the sim card in another phone so I can receive calls during the upgrade.
No Sir, in fact I turn the radio off to make sure no calls come in while in the upgrade.
I also removed my VP's sim card and stuck it in a 8820 this AM while his went thru his 45 minute upgrade and PTT removal. Worked fine
While upgrading, I make it a habit to not even touch the device while it is hooked up the cable. Any interuption is not good!