I created a new Google account. How can I migrate my android device to use this new account? I just made a new Google account, and I wish to migrate my android device to use this new account for Google Play et al. I've spent about an hour researching this so far, and the only answer I've found thus far is to factory reset my device.

This is not a viable solution, as I have thousands of apps, contacts, and other personal data that would take far too long to recover, and doing so would be inefficient. Surely the folks at Google have developed a smart way to go about this.

There must be some kind of way to simply "log out" and "log in".

How might I do this?
You can have multiple Android devices signed in to your Google account, as observed in Play Store's Device Manager:



You can also easily remove your account from your friends phone from Settings -&gt; Accounts &amp; Sync, where you can also instruct the phone not to synchronize your sensitive data with his phone (ex. sync Family Calendar but not App Data or Contacts!)

In this screenshot, the "Remove" button is on the top-right after you hit your menu key.



Hope this clears up your concerns!