Jiayu G4 advanced - Root and GPS issues.

[Mister_P]

Hi there!

I from Belgium and i did buy in preorder in march 2013 the Jiayu G4 advanced an i just received it last week from Germany.

I have a problem with the GPS, really not good and not fixing any satellite.

Some tutorials show that i have to delete a file in /DATA but i see no files and i think i need to root my phone before doing it.

My processor is the MTK6589T, 2GB RAM 32GB ROM, going perfectly and this is very sad that the GPS not working because i need it for my car.

I tried to Root it, but i don t know how to check if it s done.

My previous phone was a HTC Sensation 4G and i did successfully root it and unlocked, installed 4EXT touch menu recovery and MIUI ROM on it, i changed this phone because it was a way to slow, with about 700 mb and more of cam, it was just too slow.

My Jiayu is perfect exept the GPS and i would like to fix it.

I started with low vol pressed and power button pressed and i have a menu in chinese!

Is it possible to install 4EXT touch recovery on this phone?
How to root it?

Thanks a lot!

[GizBeat]

[Mister_P]

Hi there and thanks for your answer.

Now it is rooted but i think i will not put a recovery mode if the menu is not in english.

I having problems to get a fix and even a sat signal.

Maybe i did mess around because i did use many different programs for testing and one time i did get a successfull fix by changing the NTP server location, but once in the car, i lost that fix quickly and there was a big lack of precision, now, because i did mess around, i get no sat signal at all, at best i get 10 to 13 sats in view.

But only in view.

Do you have a checklist for the files i should check for the GPS?

I read somewhere that there is something about certificates for gps files.... i dunno.

[GizBeat]

Hi there and thanks for your answer.

Now it is rooted but i think i will not put a recovery mode if the menu is not in english.

I having problems to get a fix and even a sat signal.

Maybe i did mess around because i did use many different programs for testing and one time i did get a successfull fix by changing the NTP server location, but once in the car, i lost that fix quickly and there was a big lack of precision, now, because i did mess around, i get no sat signal at all, at best i get 10 to 13 sats in view.

But only in view.

Do you have a checklist for the files i should check for the GPS?

I read somewhere that there is something about certificates for gps files.... i dunno.

If you've changed a lot of settings in engineer mode and messed with different gps files, and not sure everything you changed, the best thing to do would be to re-install firmware for your phone.

In fact, that might be a good idea anyways. Especially if you're not on the latest firmware.

The last solution is to attempt surgery. Search the forum for 'gps surgery'.