Planning to change your primary GMail account on an older Android powered device? (having Android version 1.5 or below). I recently faced this scenario where i had to change my primary account on my Android handset and it wasn’t a very user-friendly experience. So here, i am sharing some possible ways through which this can be achieved.
1. Hard-Reset and Start All-Over again:
Yes, that’s right! And that was what I did after other solutions didn’t work for me. In this case, there are two applications that did the trick for me to backup my otherwise non-backup-able data i.e. Text messages and Downloaded Apps. For backing up your applications, I recommend using ASTRO File Manager and for the SMS backup, you can use SMS Backup software. The SMS Backup software can also be downloaded from http://code.google.com/p/android-sms/ in case you have cleared your data and are not able to access the Market. Before downloading and installing the software from this link, you need to enable the Unknown Sources Check by going to Settings > Applications.
2. Clearing Google Apps Data and Logging Into Android Market
Another way that i found while researching over this matter is, clearing the Google Apps data through Android Application manager and then signing in to any Google application like GMail, GTalk and Market. You will see the same Account setup wizard where you can configure your new Google ID. In addition to this, some people posted that you would need to ‘root’ you device and then clear the contents of folder “data/data/com.android.providers.settings”.