Hi, my Samsung GT-E2600 just turned SIM Lock so I can't access to mobile phone while SIM is inserted (not network lock, under security in Settings i have option Sim lock which is ON and when i try to turn it off it pops up a message to insert a Sim) and I don't have idea how. It is not an network lock because it is bought at store unlocked and i got an network lock key and it doesn't work. I tried to hard reset with codes *2767"3855# and others but no one worked, so does anyone have a solution for this problem, without flashing it with some special equipment.