Error No SIM card

Question

I could say that it can cause the mobile stops detecting the SIM, the icon at the top is a SIM with a diagonal line above, to move the bar the message "No SIM card" is displayed. Because of this configuration is disabled Mobile Networks.

The equipment is new, 4 days of use, brand Azumi A50LT, Android Lollipop.

Answer 1

Missing SIM card only shows when it is not detected by any of these causes:

The SIM card is damaged or has stopped making good contact or too old.
Solution: try another and see if it is detected.
Metal contacts of the card housing is damaged.
Solution: You should use the return of the terminal, as it has less than 7 or 15 days depending on the place.
The electronics that manages the SIM is failing.
Solution: Change the device.
Sure I leave me something, but if another SIM fails, change it as soon as possible to pass the days of grace.