I have TK915 for about two months (as of 3.10.2021). And when I got it, I set it up all according to manual and everything worked perfectly. But as of October 24th I stopped receiving SMS and messages from android applications.
I thought it might not be working because the battery is low. I charged the battery but haven’t received any info from SMS or application ever since.
I tried to reset tracker. First I removed GSM card, then put it back. And through SMS commands I set up the tracker again. All commands:
and after each I received SMS OK (begin ok, gprs ok, shock ok,…….)
Check123456 and after this command I received status. After G123456# I received coordinates, but when tracker(car) moved, shacked etc,…. RECEIVED NO message whatsoever. In android application I see that device is GPS offline!