Hi, I'm Ahmed. I've had this problem since 2 days. I've actually flashed like 3 custom ROM, after that I've checked that my SIM card was not readen by the phone. So I've tried to flash the stock ROM of my phone, at first it worked. But when I reflashed the same stock ROM, the IMEI disappeared. Someone told me to use ''chamelephon''. At first, like an idiot, I've chosen a random IMEI and applied it. Like always did not work, but when I re-open Chamelephon, it crashes. Any ideas?