I had bought Moto G Gen 1 at flipkart 6 months ago. Since last two months i have been facing SIM card issues in the device.
The device randomly stops reading the SIM card, I have to switch it off and remove the sim card and insert it again and then reboot.
Is this a firmware problem or an issue with Kitkat 4.4.4 ?
Check out these threads. You may wish to sign up, there, and post to whichever of them is appropriate:
Connection/SIM performance on 4.4.4
Post KitKat upgrade BUGs (Loss of signal etc)
India - signal/SIM issues?
Tho, TBH, I've not seen a response from anybody at Motorola in the months I've been watching, and contributing, to the 1st two of those threads. So I'm not sure how much good it'll do.
I even directly messaged one of the Motoloa people that had been participating in those threads. I received no response.
Good luck.
(P.S.: Twice my "G" experienced the "loss of cell signal" bug. I did a
cache partition clear and
factory reset after the second incident. Perhaps that did the trick, as it hasn't happened again, since. [Crossing fingers.])