we could not complete your itunes store request. an unknown error occurred (5002)
Did you get the error code (5002) from iTunes? This error code usually appears when you are downloading or purchasing applications from the iTunes (App Store).
First 01. Update your iTunes to Latest Version.
– Try to update your iTunes to latest version.
Second 02. Change your account information
01. Restart your computer and Launch iTunes.
02. Login to the iTunes Store with your account.
03. Go to Change Account Information > Remove your credit card information.
04. Click on Continue.
05. Restart your computer again
06. Login to the iTunes Store > Account Information> Fill out your credit card information again.
07. Click Continue to save the setting.
08. Try to purchase or download applications again.