How to reset iOS 6 device without losing your data
Is your iPhone, iPad or iPod touch is having problems connecting to WiFi, have short battery life, or other bug problems? You might want to try a settings reset first. This will return all of the device’s settings back to factory defaults, but won’t delete any of your apps or media. In fact, it won’t even rearrange your home screen icons.
How to reset iOS 6:
To reset the settings on your device go to Settings >> General then scroll down and tap the Reset button at the bottom.
On the Reset screen tap Reset All Settings – Not Erase All Content and Settings – then you’ll need to verify you want to do it twice.
It should only take a couple of minutes at most. After it’s finished, you’ll need to reconnect to WiFi, Bluetooth, and configure other custom settings.
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Via groovypost