The phone is an unofficial Indian variant. It had a custom ROM installed, and after an update, it is not receiving SIM network signals. I showed it to a shop, and they said it is a software issue that will cost 2000-2500 BDT to fix. Everything is original, and nothing has been changed. You can check it however you like; whoever buys it will have to unlock it at their own responsibility. Only the phone and security will be provided. You must come to the location.