i cannot update and install apps in my Gionees S5.1

[AC Question]

I rebooted my phone.
Clear cache
Uninstall and install googleplaystore
I even restore to FAC. Default my phone but still I cannot update and install app with a good WiFi connection.
Hope you guys can help me. Thanks.

 

[MastermindPrototype]

What strength is your wifi? What is the name of the wifi you use?

 

[MastermindPrototype]

If ur wifi is good and stable, I suggest you clean some cache on Google-related apps. (BUT NOT ALL OF THEM)
Find the thing that seem to be the cause.