Let me start putting everything on the table – this post will describe how I eventually managed to unlock an unrooted, non-Google account linked Samsung Galaxy Mini Plus (GT-5570I) device without ADB support. There are a lot of guides on how to bypass this pattern lock on Android (and I will provide some links), but the purpose of this post is to show how looking for creative ways to do this can come handy
So a friend gave me a locked device. This device had no Google account linked to it (which prevented me from bypassing the lock with that account), there was no root or ADB access via recovery, and the USB debugging option was disabled.
I found this guide here, which states some commands you can type in ADB shell and should deactivate the pattern lock. So – How do I get ADB access on that phone?