Easy step solve : Google Play store error 921

Today, we have a solution for fix a problem when you're under updating  or download app from Google Play store, and you got "Error 921". And you try many times to do it again, but it still found error. Don't worry, we will explain you to fix it as below step.

This error is similar with Google Play error 498, but this error 921 is concerned with your google mail account. So you can solve it as below step.

1) Clear cache memory out from your devices 
(Go to Settings >> Apps >> All >> Google Play Store >> Clear Cache & Clear Data)

2) Remove your google account from devices by 
(Go to Settings >> Accounts & Sync >> *your google account* >> click menu  >> Remove Google Account)

and then below..

3) Re-add your google account again, you can back to Google Play store and you can download any apps you want again.

enjoy !

Source : facebook.com/AndroidAppcenter