Re: why does it say error when i open playstore
Do any other Google apps work normally, like Gmail, Google Calendar, Drive, etc.? Does this occur on both wi-fi and mobile data?
Try any or all of the following:
1. Go to Settings>Apps>All, select Google Play Store, and Clear Cache/Clear Data, then Force Stop. Do the same for Download Manager.
2. Try a different wi-fi network, like at your local library or cafe.
3. Go to Settings>Accounts, remove your Google account, then add it back again.
4. Go to Google Wallet on the web and make sure your credit card information is current and valid.
5. Boot into Recovery Mode and wipe the cache partition (the exact procedure depends on the device).
6. Boot into Safe Mode, in case some 3rd party app is interfering somehow.
7. Last resort is to do a full factory reset. Before doing so, go to Settings>Backup & Reset, and uncheck Automatically Restore, because if some app is causing the problem, then you don't want to automatically reinstall that app after the factory reset.