How to USE STRAIGHTTALK ON IPHONE 4?

Someone please tell me how to do this! The RIGHT WAY. I have an iphone 4 on iOS6. The calling & texting work but the data does not! How do I get the internet to work?

1st you need to jailbreak it and install tetherme from cydia
then
1. Go to Settings
2. General
3. Network
4. Cellular Data Network
5. Configuration:

APN: att.mvno
username: (leave blank)
Password: (leave blank)

MMS
APN: att.mvno
username: (leave blank)
Password: (leave blank)
MMSC: http://mmsc.cingular.com
MMS Proxy: wireless.cingular.com:80
MMS Max Message Size: 1048576
MMS UA Prof URL: (leave blank)

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