I have some issues with a device with Mediatek MT6580M. The GPS was working great inside and outside of my house, however after a firmware update with SP Flash tools, it lost the imei, the mac address was changing every conexion, and the GPS didn't work.
To update the device I did a whole format and then download the firmware (maybe NVRAM data were lost).
I try to fix the imei and the wifi with NS Write Tool, now both are working great now (Android version 5.1).
However I tried to fix GPS but nothing works. In engineer mode gps view, I can see only red spots they are moving every time also in YGPS but they never fix, I don't know what to do, hopefully you can help me.
Thanks in advance.