Can I transfer my sms messages from my old phone to my new phone WITHOUT using any third party software?
With root

If you're rooted or willing to root, you can check out this method: Where on the file system are SMS messages stored?

Note: If you're transferring between different versions of Android, or even ROMs, I would check if the SMS format is the same.

Third party app


There's SMS Backup+, which is an open source app I found - GitHub, Google Play.
I'm using SMS Backup &amp; Restore for a long time (maybe years) - from their Privacy Policy, it seems that the only data they send is anonymous usage data to Google Analytics.


Note: You can use a well reviewed and popular third party app from play store (bonus if it's an editors choice), and after installing it (before even opening) - move to flight mode, backup locally, remove the app and transfer to your computer or other phone.