Ich habe diese Anleitung zum fixen des MT6589M GPS Problems gefunden.
Ich habe es noch nicht ausprobiert also ohne Gewähr. Ist auch leider nur in Englisch:
For all those who purchased chinese phone based on MTK 6589/6589T
you probably encounter a GPS fix problems. That expected and in most cases can be solved if you follow my leads here.
MediaTek was initially a GPS chip provider, only later it started to produce Android CPUs.
Some of the mediaTek GPS chips are very good (6577) but 6589 is not that great. Furthermore, some chinese assembly weld the GPS antenna very poorly in their phone. For that I can’t really help that, also other MTK chipset may not work with the steps below.
so : the software fix for the MediaTek GPS issue you need your phone to be rooted.
My device is the Lenovo S750 . a quad core MTK6589 chipset.
Do not continue if you don’t have rooted phone.
then follow these steps:
alter the JIT compiler parameter: add a new line to /system/build.prop : dalvik.vm.execution-mode=int:fast
(credit to [SOLVED] Mediatek quad core gps tracking bug… | Android | XDA Forum
Many web site forget this crucial step and GPS will not forgive them...
download (on rooted phone) fasterGPS and let it re-write /system/etc/gps.conf according to your geographic location (or look at the bottom of this document for sample file) . it will change the NTP servers which help to sync the GPS.
download the EPO.dat file to /data/misc folder. Trying to download the file from MobileUncle Tools menu will 99% fail. will show progress 0. so either download it directly from MediaTek FTP : ftp epo.mediatek.com user: epo_alps pass: same as username (that FTP server is also down 90% of the time) or use the a nice App that bundles that chip EPO file: https://play.google.com/store/apps/details?id=com.chxdev.mtgps
open MobileUncle Tools and enter engineering mode (MTK), tab navigate to location , press Location Based services. make sure APGS tab has enabled A-GPS. switch to EPO tab: make it autodownload and also press explicit download (EPO idle button) in most cases EPO download file will fail as I explained later.
(credit to MTK Phone GPS Software Fix | 16 October 2013 - Download MP4
delete (using some Root enabled file explorer like https://play.google.com/store/apps/details?id=com.estrongs.android.pop
) the /data/misc/mtkgps.dat (or /data/mtkgps.dat)
reboot phone (important)
make sure you got a 3G/WiFi internet connection, go outside to the garden and open MobileUncle Tools and enter engineering mode (MTK) and enter YGPS menu . switch to Information tab press in this order: hot,full,A-GPS restart .now switch to satellite and you should start a sat fix. you should see after a minute like 8 satellite in the circles screen. sit and wait 8 minutes. you should see gradually the GPS picking up the signal.
after you (hopefully get a lock) you can disable the A-GPS and EPO (using MobileUncle Tools) and it should still be able to re-lock your position even without internet. (takes on my device 27 seconds when GPS is cold, 8 seconds when hot)