Ok, I am a bit confused. I know what the emails, and internet part of the plan are. I also understand that the BB messenger is under data. Are either SMS/MMS free under the plan, if so which one and what is the difference. I have also used the yahoo and aim features, which used to be charged to a text count. But online it seems they are not are not being added to my running total at the TMO home page. I am new to this and don't wantto be shocked at the end of the month. Does Blackberry keep count then give the billing info to TMO. I never used the text on my past phones, and don't see much use for it now, the email works fine for my needs. In most cases any text I receive from phones other than BB are new people who dont know me and not into a texting game, I like to just call and get it over with. Email is a different story now I have the blackberry, thats pretty cool and useful. I have tried to figure out from the site at TMO what is part of the plan and what to expect as extra billed items. I have the Curve and it gives different options on how to send different messages from the SMS/MMS to email, or BB messenger. From on here I read the BB Pearl needed a data plan to send MMS messages if it does, then is it covered under the plan I have. Which goes back to the question, what is the diffence between SMS/MMS? Any info you can provide is helpful.