Hi, Ershadismail, and welcome to the Community,
Skype has not made any announcements about plans to release versions of the Skype app for older BlackBerry OS devices (OS 7 or 6). Skype is now available on the BlackBerry Z10 and Q10 devices running the 10.1 OS update.
For more information, please see these FAQ's:
Update! In my instruction on how to contact Skype Customer Service , the blue "Send" button has been replaced with a green Next button; to file a request via e-mail, click "Send."
Online Safety Tip: Do not accept contact invitations from anyone whom you do not know.
Do you have a Skype trick up your sleeve? Share your Solutions and Tips with us!