How do you get the phone icon on facebook chat?

[Bob Marley]

most of my facebook friends have it and most of us have blackberry's ahhh i really want it! i have facebook app on my phone and it all works perfectly fine! whenever i'm online it just has the ugly bogie green circle and when i go offline it has nothing ! please help i've looked for info everywhere but nobody seems to know!! thanksssss x
it still doesn't work and i went on my friends facebook on our messages and it didn't even say 'send to phone' on messages on the tick box it just has the 'press enter key to send' :'(

[SkinHealthBoy]

It will be on if you are on facebook on a mobile device that what it is there for so if you use facebook on your phone the icon will be there. If you are using facebook on your laptop then you will not have that mobile icon it just shows how they will get the message.

[Daniel]

You Dont it Does it Automatically you Cant See it on your Mobile Device your Other Friends Should See it if your Actually Using the app it may not show but close the app and stay logged in and it should Show Hope this Helps