Moto G has a dual SIM capability, which is why it is one of the most sought after phones among its competitor. With its sleek design and clear display, some are very satisfied with the overall good and consistence performance by Motorola Moto G phone.
The problem with Moto G that is related to its SIM card function is sometimes one of the functioning SIM cards suddenly loses recognition by the phone. There isn’t anything in particular to trigger the sudden lost, as the phone could be working fine one minute and fails the next.
The SIM card problem also can be a drop service from carrier. If the SIM is detected properly, it will drop again later with no obvious reason.
Potential fix undetected SIM in Moto G:
Try using other SIM card to make sure that the problem is not related to your Moto G device. If most SIM cards fail working on your Moto G but work fine on other devices, then it is likely that the problem lies with your unit.
The type of card that is compatible with Moto G is a Micro SIM. There are many popular alternatives with SIM card nowadays, such as placing a Nano SIM with an adapter or cutting down the size of bigger SIM card into the Micro SIM size.
While other phones might be able to tolerate these alternatives, it is best that you avoid using them with your Moto G phone. Instead, ask for a new Micro SIM card from your service provider. Other solution for Nano SIM card is by trying a different adapter to see if it works better.