For those of you who want to use your locked Galaxy Note 3 on another carrier or want to disable region lock because you bought your Note 3 from overseas, here’s how to unlock SIM and also disable region lock on your Galaxy Note 3.
Step 1. Insert a SIM card that’s not supported by your Note 3. E.g. I’ve inserted my T-Mobile SIM card onto my AT&T Note 3, now I get a SIM locked window when I start my Note 3.