[LG Optimus Black] dcop7:
Hi,

I had a few problems with GPS in IZS so I search a bit and try to compile a fix. For me, this appears to be working... But other testers and appreciated :)

You just have to do the fowling:

In recovery, flash the attached zip

After reboot, using a app like GPS Test (https://play.google.com/store/apps/details?id=com.chartcross.gpstest&hl=en), clear AGPS data

Please, give feedback.

UPDATE:

I've uploaded a new fix (GPS_fix_2_world). This is a different fix from the other, one that isn't depended on any continent.

Source:

http://xdaforums.com/showthread.php?t=953630

Credits to AngelDeath

http://xdaforums.com/showpost.php?p=18096764

Credits to crypted

UPDATE2 - NEW FIX - From Mackey

I've upload a new GPS fix - GPS_FIX_WORLD.zip

This fix is based on Mackey/ShenDu/MokeeOS's ROM, and to be sincere, it is the best fix I've ever seen so far. I've got a lock within a minute without any data/wifi on, without any AGPS data...

Steps for this fix:

Turn off wifi/mobile data (so that it wont download any new AGPS data)

Clear the AGPS data (to be a clean slate)

Reboot to recovery

Flash the fix

Clear cache and dalvik cache (this is the first time I tried and it seems a important step for the fix to work)

Reboot and that's it

Please, try it and give feedback!

UPDATE3 - NEW FIX - Using LG server

After many hours of testing... He is my conclusion. The GPS alone can't get a useful signal...

To make this new fix work...

turn off the AGPS*

clear the AGPS data

delete the files (not folder) in /data/gps

reboot to recovery and flash (http://xdaforums.com/showpost.php?p=42195149&postcount=56)

reboot

open an app like GPS Status and download the AGPS data only from the app (https://play.google.com/store/apps/details?id=com.eclipsim.gpsstatus2)

* To turn on/off the AGPS go to localization services and turn on the option that is something like "use wifi and/or mobile data to determine your location"

Don't use AGPS from localization services... You just have to download the AGPS from time to time.

UPDATE4: NEW GPS FIX TWEAKED BY DCOP7

I've made a new fix and I want a few testers. Who can help me?

To make this new fix work...

turn off the AGPS*

delete the files (not folder) in /data/gps

reboot to recovery and flash GPS_fix_tweaked_by_dcop7.zip

Turn on mobile data of Wifi and open GPS Status or something. This will download a file explained below

Need to turn on mobile data or wifi when getting a GPS signal every few days to refresh the file downloaded in point 4.

* To turn on/off the AGPS go to localization services and turn on the option that is something like "use wifi and/or mobile data to determine your location"

What is the difference between this fix and other fixes?

This fix is configured to download the information: Long Term Orbits. This information is like and enhanced AGPS data. The Mackey fix sometimes use this information, that is why some people get a lock very fast, even if they clear AGPS (this information isn't cleared when GPS Status clean the AGPS data). To clear every bit of AGPS data, delete the files present in /data/gps (point 2).

What took me a long time to understand is when this information is downloaded, what interval, etc... It was difficult to understand why the Mackey fix download this information without any patter. That is why, with Mackey fix, after a few days, the GPS performance dropped.

I think I figure it out. Please, test this fix and give some feedback.