Impossible to access the Internet? Failure? Network?
It may be that your smartphone lose access to the Internet overnight, after being off, without having touched or changed the network configuration.
However, note that some applications can be downloaded nevertheless, but others may just be synchronized.
Reset network settings
To restore access to the Internet, you can restore the default network settings of your phone.
Your personal data will not suffer the risk of being altered during this stage.
Go to the main screen of your phone -> then "Settings" - -> "Wireless & networks" -> "Mobile networks" -> "Access Point Names" -> press the "Menu" button> press the "Menu button "->" Restore Defaults ".
It is possible that at this level the network does not always work. Sometimes you need to set the date and time.
Setting the date / time
To communicate properly, your smartphone and servers will need to communicate dates (to know for example if your request has expired). It is particularly necessary during synchronization.
If the date is detuned after turning off your smartphone, communication in the network will fail to turn it on.
If this is the case then set the date and time on the phone and tap the "Auto" box.