Internet won't work on iphone 4 for straight talk?

I recently hooked up an iphone 4 into straight talk with a micro sim. I have the 45 dollar data plan with straight talk but it won't let me on to the internet. It says: you are not subscribed to a cellular data service.

How to Add Straight Talk APN Settings for 3g Data on iPhone 3g/3g/4 With Apple iPhone Configuration Utility

http://straighttalkiphones.com/straight-talk-iphone-apn-setup

Wow, researching this made me feel lucky when activating my Lumia 900. Just a quick read, it looks like you use a modified T-mobile SIM card or jailbreak your iphone. There's too much to post here so I would recommend reading the following thread.

http://www.ifans.com/forums/threads/how-to-use-straight-talk-prepaid-with-iphone-4-and-probably-4s.362641/page-7

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