Blackberry 8100 Messenger

IF you;re talking about BBM(blackberry messenger), you have to have blackberry internet service. which means that you cant use it unless you get the blackberry data plan. if not ten you cant use the service. for sormal IM, you have to install an IM program.

Blackberry messenger is installed through the Add/Remove components of the Blackberry desktop software.

The only way to receive Blackberry Messenger services is to pay a carrier for a subscription to the service.

There is no unlock, hack, backdoor nor any other way to obtain the service.

GET THE PHONE THAT YOUR CHICK/GIRLFRIEND HAS

Make sure you have the latest OS supplied by your service provider. The latest OS for the Curve (8320) is 4.5.x for most providers. You can get the latest by going to blackberry.com.

you have not specified which Blackberry you (from your provider or an unlocked one) but to put back Messenger back inside you need to download the latest Blackberry software from THE CARRIER THAT IS ON YOUR BLACKBERRY (whichever logo is printed on your blackberry) and install it on your computer. Then using the Blackberry Desktop click app loader and select Messenger to load to your blackberry

Once you get a blackberry email account set up through your phone you'll have to turn your phone off then on and then your phone will automatically download and update itself, and you'll have your applications :)

Follow this link: http://na.blackberry.com/eng/support/devices/#tab_tab_pearl_downloads and download the Blackberry Desktop Manager. This will allow you transfer data between your computer and Blackberry.

Hope this helps!