Iphone 4 with straight talk? - 2

I have an unlocked iphone 4 with straight talk service. I downloaded unlockit.co.nz and it changed my apn so that I could have data on my iphone with my straight talk service. This worked fine.yesterday my 3G and data randomly stopped working. I turned my phone on and off, took out the sim and put it back in, and even re downloaded unlockit profile.nothing has made my data work again. How do I fix this. I don't care about mms only data for like twitter and stuff

Check your APN settings.

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