6.5" Phablet that works!

[Sniper47]

Looky, in this order, I'd recommend leaving the phone out for 15 minutes with gpstest on and screen set to stay on. If that doesn't get a lock, next step would be to run fastergps (requires root) and set your location, if still no lock after 15, then delete mtkgps.dat, reset, and give it another go. If none of these work, it's time to update the ROM if you haven't already done so. In all the China phones I've owned, I've never had one that didn't do fine with GPS. Other than MT6016 which doesn't have GPS onboard.

All MT6592 and MT6582 have the same GPS chip. If it's absolutely not working after following all steps above, then it could be a hardware issue with the antenna not making contact properly.