Incredible, it’s been almost 10 years since I created my account to publish my first mod on this platform. I love that it is still around.

You can configure the contacts app to disable automatic sync with gmail. On a fresh install of android it is disabled.

It’s actually a really good question. What you’re explaining is called a collision, by creating the same hash with different numbers you can succesfully login.

This why some standard hashing function become deprecated and are replaced when someone finds a collision. MD5, which was used a lot to hash passwords or files, is considered insecure because of all the collisions people could find.