I am very thankful for your careful explanation about what I was supposed to do to solve the problem of failure to sim card detection by mobicel metro 2. Sadly, the suggestion did not help to solve the problem. I rooted the device with Kingo root and after that I downloaded the chamelophon apk and followed all the instructions. After having done everything, the phone still read " to place a call first turn off airplane mode" when I tried to make a call. The airplane mode is turned off. Please note that when I turn on the phone, it says "No service" and after some minutes or so, it says slot 2 no sim card detection, slot 1 no sim card detection. Please help on what I should do.