Or Steps :
IMPORTANT : Your Device Must Be Jailbroken & Must Be Version 5 (5.1.1 , 5.1 , 5.01 )
1- Open Cydia
2- Go To Sources , Edit , Add
3- Type The Source Its : repo.siriport.ru
4- After Installation U Will Find Siriport.ru Open And Install Certificate
5- It Will Open Safari Press On Install Certificate And Do The Steps As Shown
6- Go Back To Setting And Go To Siri And Make UR Options
7- UR DONE !
P.S. : If It Doesn't Work For You Comment Below Or PM Me And I'll Add Another Way To Get Siri