Is there a way to change the google account linked to the g1 w/o soft reset?

[smoger]

Yes, you will delete all the phone numbers (Only) that were entered or say imported via sim card if you reset to fatory settings.

Gmail will only sync the email contacts.

To verify, check your Gmail on the browser, any contacts that are not there will not be synced

i may be misunderstanding you but i just checked gmail and it HAS been syncing my phone-only contacts...

[firnasz]

I'm new to this.

I also want a reply to the question of this thread at start. Please anyone guide how to change the google account attached.

[colour1100]

If not soft reset a Hard reset will surely do the job...