Please help! i need to remove a primary account on an android running on 2.3 without factory resetting. I tried deleting the Google apps thing but it wont work is there any other way?? please help!
If that doesn't work then I think the only way to do this without factory resetting is to root your phone. Whether and how you can root your phone (and how easy/hard it is) depends on which phone you have.
http://www.techfreeks.com/how-to-change-primary-email-of-android-without-factory-reset/