Follow this tutorial: http://gizbeat.com/2...tk6577-mtk6575/
Then get a working gps.conf file. I pulled the one from my Huawei G300 but Tillaz has also put some up for download.
Now Launch the "GPS Test" app and wait for lock. Works better outside and the first time you launch it, for that day, it can take 30 to 60 seconds to lock up, but after that it should lock within 10 or 20 seconds. Now this is the important part and seems to make a difference for me. Do not close the GPS Test app by hitting the back button, just press the "Home" button about Ten seconds after you have attained lock on the GPS Test app. Now launch Google maps or your preferred Sat Nav app, and wait for lock. It should lock up quite fast. I tried this with Sygic yesterday and it worked perfectly so I also tried it this morning and again I attained lock in both Google Maps and Sygic.