Yes,I know what you are thinking off.What is S-OFF? and why is it needed.The answer to your question is so simple that i was in your subconscious mind but you couldn't get it out.Here is the answer.
S-Off is a kind of security for the HTC devices so that you don't mess with the Hardware config.Even if your device is rooted and the bootloader is unlocked you wont be able to Sim -unlock your device if you have S-On enabled on your device.Which refers to the security flag which is on your device.
If you want to Sim unlock you device which is normally a paid service and install custom Hboot versions and also downgrade your device you need to S-Off your device ,which refers to the security flag being removed .
S-Off is a kind of security for the HTC devices so that you don't mess with the Hardware config.Even if your device is rooted and the bootloader is unlocked you wont be able to Sim -unlock your device if you have S-On enabled on your device.Which refers to the security flag which is on your device.
If you want to Sim unlock you device which is normally a paid service and install custom Hboot versions and also downgrade your device you need to S-Off your device ,which refers to the security flag being removed .




