I spoke with BB Support and explained that in reading the PDF manual on page 38 I believe it shows the SMS text option. That is not the case. The BB 8350i is MMS. To get the text message to show in your messages folder you have to go through your message folders and choose
2. General Options
3."SMS and E-Mail Boxes" - Combined
You have to purge both boxes and then you will have your SMS "MMS" messages come to that box. They stated that Sprint uses SMS but Nextel uses MMS. When I questioned if people had to type in a different address than our number to send a text I was told no. Hopefully I've provided some help or relief as I was confused for much of the day when speaking with several BB support reps.