How do you download blackberry app world?!?

-Ive searched and i cant find anything, how do i download it, where from? How do i get onto facebook without it charging me but taking the 拢5 for my internet that goes towards black berry messenger? on that note, my friend tried to add my pin and ive not recieved the invitation? Thanks :)ok you need the blackberry 拢5 per month data plan active to use apps world, facebook and every other blackberry service. as regards apps world you can type in google search on your phone "blackberry apps world download" and download it direct to phone.go to blackberry app world on your computer and download it