I don't know if this has been posted or if anyone knew about this as I did a search and did not really see anything....unless I am completely blind which could be, but hope not... If your like me and when you got your phone and you did not have a gmail acount and just created one and now wanting to change it, you can without any installs or factory resets.... 1)goto your home screen 2)settings 3)applications 4)manage applications 5) gmail and gmail storage 6) clear data on both 7) turn off phone all the way and restart now goto market and it will ask you to put in your gmail info...just put in the new gmail account you created....now your contacts will be gone, but if you go to your gmail account on a pc and click on contacts you should see export. Click on this and it will ask you to select a program to save it to. Then sign out and then sign in to your new account. Click on contacts on new gmail account and then contacts and then import. Contacts are switched. Goto your phone and dialer and contacts should be there. If not give it about 5-10 seconds.