Motorola — Motorola phone not working

Address:

New Delhi, Delhi

In April 2015 someone gifted me a Moto G 4G bought from Dubai . The first week I got the phone, it was working properly. After a week it began to show me the indication that there is no sim card in the phone, I tried my best to solve the problem like restarting the phone, formatting it but it was still not accepting that particular sim card I even changed the sim but still it was working then I changed my no. and went for another company's no. it worked properly for the following two months and after that the same thing is happening. Now the phone restarts on its own also if I plug it for charging the phone switches off on its own and then I have to unplug it and then I have to switch on it.