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From last few days I have seen several people are complaining that their Mi Devices is not able to update the app through playstore, it always shows the 'Waiting for WiFi' and nothing else even though all the settings of playstore is okey and you have a proper WiFi connection.
Even though by updating your USB drivers for the devices the issue is still there..
So Guys I have got a very simple fix for you all ...Dont worry, you dont need to download anything..even this can be done without Internet connection.... just perform following steps on your device
Please note that its a temporary fix and hoping to see new update coming for play store app soon so that this problem gets fixed.
Note: I personally tested this method on Xiaomi Mi 5, Redmi Note 4 and on Mi Max . This method should work on other models too.. But I can't be blamed if it does not works to your device. You're doing all of the this at your responsibility!!!