Hi, please PM me quick with your details. We use an over the air update server, if we can get your details we will push the firmware update to you. In the mean time if you can check your Network Mode setting, it should be on Auto
Nope, this could be a case of you been close to the edge of the cell, or between the edge of two cells - NSA handles this differently to SA. Lets see, i would recommend moving the router a bit, even 20cm could solve this.