Jiayu G4S 1/4 , touch screen calibration needed

[henfe]

I have touch screen issue on my G4S 1/4

I upgraded my G4S from 4.2.2 to 4.4.2 and then I backed to 4.2.2, from this point the touch screen has loss hes calibration , and when I upgraded again from 4.2.2 to 4.4.2 the screen problem still not solved .
Someone know to to solve it ?

[wmtablethun]

I need for the solution too :S

[caber]

IF G4S use Goodix Touch panel (GT9xx serie) there is something you can do to revert to original parameters, otherwise what i start to write now is not useful .

the GT9xx controller has an internal eeprom to store firmware and parameters, controller don't upgrade the parameters if version of new parameters is not greater than actual.

you should ask to someone else with a working G4S to use the app GTPTool to save his working parameters, change version number, then you can load into your phone.

[avivaldo]

Hi,
I have also a problem with a replacement screen in a THL T100S. My new screen is not calibrated. do you think it could be the same problem?

[tv2q0]

I have the same problem but by different reasons. You must get another jiayu g4s (in your case), a friend who has it and want to help you with that, for instance; but must be a phone with a non decalibrated touch screen, and follow these steps. When you get the good configuration file for your phone, just write me to help you with rest of the steps
To perform these steps, your phone must have OTG support, I mean, that recognize an external mouse or you can control by another way your phone (using vnc for instance
first steps:
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