This issue catches the best of us … including myself. In order to change or insert the Sim Card you have to removed the bottom cover by 4 screws. It’s tempting to insert a sim card and just power on the unit and test it before putting the cover back on. But GOTCHA! It won’t work. You have to put the door back on and the screws.
Alan Spicer Marine Telecom
+1 954 354 2748
+1 954 260 9645
communications @ marinetelecom.net