Update to iOS7 Beta.

Currently the iOS7 is in beta version which is available for only apple developers, but actually it is also for end-user for a try in the mean time.

iOS7 support from iPhone 4 up to iPhone 5, in order to update to iOS7 Beta we need to proceed these following points :

. Back up your iDevice
. Make sure you iDevice is running iOS 6.1.3 and already activated
. Download iOS7 Beta for your iDevices accordingly, you can find the link in this  
  site http://thepiratebay.sx/search/ios%207/0/99/0
. Plug your iDevice into computer and fire up your latest iTunes and click on :
   - Windows : Shift + Update
   - Mac : Option key + Update
. Done.!!

Note : 
. Do not use restore button in iTunes, use button update, because it is cannot be activated yet unless 
  you have developer ID. That's why we MUST update from  iOS 6.1.3 to preserve the activation.
. iOS7 cannot be jailbroken yet, so decide your own decision.