his trick only works on A5 and Above devices for A4 devices use this Link instead to bypass icloud lock iphone http://mycrazytricks.com/apple-icloud-lock-bypass-for-iphone4

http://mycrazytricks.com/bypass-icloud-activation-lock-for-iphoneipodipad-on-ios-8-3-and-8-4

if you have an icloud lock Idevice THIS DNS method and facetime method will let you to Bypass icloud lock and will enable you to use you Iphone with full functionality
to successfully Bypass Follow the Video and Download the Detailed Trick from above Site
Please Note it is Recommended to update your Iphone on Latest IOS