First let me clear what is icloud
Icloud is a cloud service by apple to Store contacts, calendars, photos, music, books, apps . Moreover a new security service is created by Apple by which you can wipe your data and lock your iphone remotely if your device is lost or stolen therby preventing your data from wrong people who found your device. You can achieve this by enabling find my iphone. The device will be paper weight ( bricked) unless a correct icloud username and passwword is entered.
There are many genuine people who bought this iphone from ebay or any online service and found that their device has icloud enabled.
This tutorial is only for genuine people ( Not for thieves)
Ok Now you may ask what is the solution if you got this device from other seller
There is one team called Doulci team who have unlocked almost about 70000 iclouded locked device through their icloud alternative sever- THE DOULCI SERVER. On may 29 about 30000 icloud locked device are unlocked. But their server is down at this moment. They are working on NEW Doulci activator (Software) by which you can unlock your icloud locked device without the need of itunes. This software is in beta phase and can be only downloaded from link below. This software was leaked from one of the beta tester.
Video Tutorial on