Some of the Moto G users have been complaining about the data lost and SIM card problems after updating the device to Android 4.4.2 Kitkat. Several people have posted in the Motorola forums about the issues that they are facing. Some of them include App download errors,dropped calls, loss in connection, popup errors, and errors relating to Airplane mode and a host of other problems. These issues is not just limited to dual sim users as there have been several people reporting similar issues from multiple countries.
Although the cause of these issues is unknown, a Motorola representative did confirm that they are looking into this issue.