NAM 1 or NAM 2??????

a couple minutes ago, i was just messing with my phone (Samsung Glyde) and i went to system select. it has two options: NAM 1 and NAM 2. it was set on NAM 1, so i decided to change it to NAM 2 to see what it did. It restarted my phone, and when it came back on, a box pops up that sas "initial progamming needed" and it asks for my lock code. when i entered my lock code it says that it is the incorrect code. it won't let me text, call, or chck anyhing on my phone. does anyone know what to do?