And please give a link to CM11?
Why is GPS useless?
Because it's very inaccurate in this phone. The phone say that the accuracy is about 10 meters but it shows your location a few hundred meters away so it's useless if you want to navigate.
For me none of the MTK tweeks made it better.
I'm just said it should be the last thing you fix
include /* * Your warranty is now void. * * I am not responsible for bricked devices, dead SD cards, * thermonuclear war, or you getting fired because the alarm app failed. Please * do some research if you have any concerns about features included in this ROM * before flashing it! YOU are choosing to make these modifications, and if * you point the finger at me for messing up your device, I will laugh at you. */