Xperia system update couldn't verify

[Sunny_k]

I think c4dual has wasted my money now this phone will not updated via WiFi when it prompted to download Xperia system update each time I have to visit service center for those updates

[Uliwooly]

@Sunny_k

That's odd, how fast is your internet connection? 

What if you boot on safe mode and try to update OTA?

[Shahram1344]

Android 6  system update couldn't verify