First method - Clean all cache and data
Go to "Settings". Enter "Applications" and then "Manage Applications". Select "All".
Go to "Google Services Framework" and press "Delete data" and "Clear Cache" to delete all data related Google Services Framework.
Go to "Google Play Store" and select "Delete data and clear cache" to delete all data related to Google Play Store.
Second method - Remove and add your account Google Play Store
Go to "Settings". He then goes into "Accounts" select "Google" and "Your account".
Go to "Menu" and select "Delete Account". Then "Add your account".
Now restart your mobile and try to download or update an app.
What if your mistake has not yet been solved? Do not worry, there are more solutions. You count them below:
Third method - download and install a different version of Google Play
Sometimes a different version works better than you already have. Try to find a (old or newer) and test it.
Fourth method - Check if Google Play is installed on your device as system application rather than user application. (It takes rootear)
If Google Play is installed on your device as a user application, try to install it as an application system. There is an application that helps you easily change. Look for it: it is called "/ system / app move". You may need to root your android device before using it, so do it at your own risk.
Use an application different market
You could try a different market application, as 1mobile or SlideME. There are some others, and depends on what you prefer to use.
Factory data reset
If you do not like the idea of using other applications market, the next solution is to make a complete reset of the phone. This will remove all data from your device, so make sure you keep what you do not want to lose. To carry it out, you only have to enter "Settings", "Personal" and "Reset".