I've noticed a fair amount of people have been searching for this answer (especially some of the folks over at Howard Forums): How to get MMS working on a Samsung i617 (BlackJack II). Well I've been searching this answer for a while and nobody in this forum with a Samsung Jack has been willing to help me out. The tech support at Rogers gave me a bunch of settings, but nothing specific for this device; none of them worked, and incidentally, they obviously didn't give me ALL the settings because there was a bunch they never mentioned. Finally, I was ready to go buy a Samsung Jack from the Rogers store and return it because they didn't have a functional store display model and wouldn't let me touch a boxed one. Luckily, when I went in this time to actually purchase one, the lady working there just pulled out of the box to let me take a look at it! Finally, some decent customer support instead of the usual "can't, won't, unable, sorry sir". I'm just iterating all this so that you know the loops Rogers makes you go through for not paying $400 for their i616 which by the way is exactly the same as the i617 but WITHOUT GPS (and they only have black, not the burgundy). Without further a due, the settings to get MMS working on your BlackJack II:

GPRS:
Profile Name: RogersInternet
Connects to: The Internet
Access Point: internet.com
Everything else Default/Blank/None

Profile Name: RogersMedia
Connects to: Work
Access Point: media.com
User name: media
Password: mda01
Authentication Type: PAP
Everything else Default/Blank

Proxy:
Profile Name: HTTP
Connects from: The Internet
Connects to: WAP Network
Proxy: 10.128.1.69:80
Type: HTTP
Everything else Default/Blank

Profile Name: Socks4
Connects from: The Internet
Connects to: WAP Network
Proxy: 10.128.1.69:1080
Type: Socks4
Everything else Default/Blank

Multimedia Msg. Options
Sending Options
Priority: Normal
Validity Period: Maximum
Delivery Time: Immediatly
Creation Mode: Free
Size: 295 KB
Request Delivery/Read Report: Unchecked

Receiving Options
Download Mode: Automatic
Reject Unknown Sender: Unchecked
The rest are all checked

Multimedia Msg. Profiles
Profile Name: RogersMedia
MMSC URL: http://mms.gprs.rogers.com
Proxy: Checked
Address: 10.128.1.69
Port: 80
GPRS: RogersMedia