Because people are randomly adding your PIN & instant messaging you.
A Blackberry functions as a personal data assistant basically a mini computer. Blackberry's also has the exclusive blackberry messenger service so they can send instant messages to other blackberry's.
no, blackberry mail is for e-mails, blackberry messenger is instant messaging
blackberry messenger is a Instant messaging system you can do a lot more than texting alows you to do for blackberry to blackberry only.
BlackBerry Messenger. Instant messaging on your BlackBerry, very good actually.
yes
Voicemail, email messages, instant messages, data on handheld devices
no not really
Blackberry to Blackberry messaging (BBM) is a way of text that is used by Blackberry owners. There is something called a pin, which is a series of numbers and letters, that is a "password" to adding someone into the contacts list. Blackberry to Blackberry Messaging is a form of instant messaging, just like Aim.
contact your blackberry network
Yes, the BlackBerry 8820 supports sending and receiving MMS messages.
Instant messages
You have to download it first. Find it in downloads. Move it to instant messaging. USE IT!