thanks and I just like to mess around device, lol
Now I want to share something.
my drivesmart 61 previously has patched 4.1 firmware, everything is fine until the 4.3 version...

I patched the 4.3 and drop into GPS and flashed successfully.then:
1. smartphone link cause gps to shutdown
2. normal road routing can cause gps get into bootloop, UNUSABLE...

I downgraded to 4.1 patched firmware using updater.exe and then upgrade to official untouched 4.3 version, now, everything is working perfect...

seems like new firmware has new algorithm or something...