Besides BlackBerry, BlackBerry Messenger (BBM) is also available for use on iOS and Android devices.
yes
Please tell me you are joking, of course not it is called BLACKBERRY messenger not rio messenger so,no.
you go on your apps and type in blackberry messenger (BBM) and click download you might have to pay though :)
One can get MSN Messenger for Blackberry by going to the blackberry app world website on the phone or application, searching for the MSN Messenger application and download for free.
no you don't need credit to send messages on blackberry messenger
you need to download blackberry app world from the internet of your phone. Once you've downloaded it, you need to download blackberry messenger (if you don't have it yet on your device). Then the app world will automatically be informing you about the upgrades of any thing you download from there, inculding blackberry messenger.
Blackberry Messenger only costs £5 on a pay as you go phone.
yes you can, you just go into any phone shop and buy a blackberry and there already unlocked. blackberry's are only locked if you get them off eBay and those sort of websites. i got one from carphone warehouse but my blackberry messenger isn't working so ill be carefull about blackberry messenger, :).
almost all modern blackberry smartphones nowadays have BBM, so it does have it, and if it doesn't come with the phone, you can download it from BlackBerry App World or from the BlackBerry official site.
if your phone company supports the blackberry and if you signed up for blackberry service. I pay an extra charge for data/bb messenger so I can send messages to friends who's PIN I know.
no, blackberry mail is for e-mails, blackberry messenger is instant messaging
unfortunately Blackberry Messenger is no available on any other phones except blackberry's.