Is there an easy way to get my MMS enabled with straight talk?

I have an unjailbroken, unlocked, iphone 4 with the iOS 6.0.1 update. I use a microsim from the carrier straight talk, everything runs great on the phone except MMS. Every time I try to send a picture to someone that doesn't have iMessage, it says delivery failure. Apparently this is common with most iphone straight talk carriers, how can i enable this?

This is similar to the old Sim Swap method some people used to use in iOS 5.1.1. Make sure you have the unlockit.co.nz Straighttalk profile installed first ( Go to http://www.unlockit.co.nz from your iPhone and follow your Nose) as this is the only way to set the Data Proxy needed (or some websites won't work I have been told)

1. Close all opened apps
2. Place T-Mobile sim in iPhone
3. Open Settings, General, Cellular, Data Network
4. When Data Network Appears ( the screen will move back to Cellular)
5. Swap T-Mobile Sim to Straight Talk Sim
6. Wait for the "NO SIM" splash to disappear
7. Press Cellular again and Data Network should still be there.
8. Go to Settings and make sure the information below is entered.

Cellular Data

APN: att.mvno
Username:
Password:

MMS

APN: att.mvno
Username:
Password:
MMSC: http://mmsc.cingular.com
MMS Proxy: 66.209.11.33:80
MMS Max Size: 1048576
MMS UA Prof URL: http://www.apple.com/...uaprof.rdf

9. Press Cellular to Exit.
10. A restart of the iPhone may be needed. ( Hold down Top Button, slide to Power off and then start again with Top Button)

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