Suscribe friend's status via email

Recently, facebook has launched new feature "Subscribe via email" by this feature, user don't need to sign in to facebook to know friend's update status. This new feature will send you "Friend's status" via short message and facebook user also be able to comment via message sent by facebook, or even user also be able to subscribe other people, for example you can subscribe someone you admire (fans page).
How to activate this feature? see the example bellow:


To activate this feature just click "Subscribe via SMS"
Note:
If you have mobile facebook that has been activated for your mobile, you will receive facebook message after you have confirm "Subscribe via SMS" . But if you haven't registered yet for mobile facebook, you will be directed to some steps to activate this feature before you receive the message. Facebook doesn't take any cost for this feature, it depend on your cellular provider.