Error downloading(Play Store) Error 400

[bigt1973]

I am unable to download apps on from Playstore via Wifi only on 4g

error message reads

cant download app

'name of app' cant be downloaded.  Try again and if the problem continues, get help troubleshooting, (Error Code: 400)

ive tried all the troubleshooting options and none work!

any suggestions?

thanks

[CameronT]

Hi @bigt1973,

Welcome to the community.

I am sorry to hear you're having problems with the Play Store

Can you please let me know what troubleshooting steps you have already taken so I don't have you repeat anything you've already done.

[bigt1973]

Hi, I followed the six steps in the troubleshooting guide which included checking storage space, switching on airplane mode and off again, switching WiFi off and on, resetting my router, force play store to stop, clear data and cache, update play store and finally restart my device. None worked.
Any help gratefully received
Thanks

[CameronT]

 @bigt1973,

Does this error only happen when you're connected to WiFi? Does it not happen on 4G?

[bigt1973]

It only happens on WiFi.

[bigt1973]

Just noticed that my phone is also identifying itself not as an X but as a z3 on email footers too!

[CameronT]

@bigt1973,

That would indicate the issue is with the Wi-Fi you are connected to. Does this happen on all Wi-Fi connections? Just one?

[bigt1973]

Hi, yes it appears to just be my WiFi... Any idea what it could be?

[CameronT]

@bigt1973, 

Are you experiencing any other problems on your phone while connected to this wifi connection? Can't browse, view youtube etc? Do any other devices on this network have any issues?

[bigt1973]

Turns out my daughter can't download apps either on her Xperia Z3 but we can access pretty much everything else. No other loss of functionality