The cause of the Mobile can not make a call

Here there is the experience surrounding the mobile, there are friends who ask me to fix it, the problem can not create nelpon Mobile, here's how I cope with the mobile can not make a call

1. Check if the mobile phone signal not seen signals, means that the problem in mobile

2. Check the sim card, if the pair dihandphone are correct, it could be just a SIM card

3. See if in your network, if there is no network that causes mobile can not make a call

The share short, hopefully help. About the causes of Mobile could not create nelpon and fix