Are your apps being backed up as well? Corrupted apps can cause it to lock up as well. GEt one more replacement, and use it without logging into your gmail. Get the new versions of the apps if available. I know it's a hassle, but an android phone is more like a computer and it does require maintenance as does a regular computer.

But the phone acting up right when you add apps sounds like corrupted apps, or those apps may not get along with gingerbread all together.>Post edited to comply with VZW TOS.<

Message was edited by: Verizon Moderator