How to get 4G (HSPA+) back on an iPhone 4S on Net10 after the carrier update?

I updated my iPhone 4S to iOS 7. And I was asked if I wanted to do a carrier update. So I did it and my signal went from 4G (HSPA+) to 3G? I noticed a difference in internet speeds and it just kind of makes me irritated. Is there a way to get my 4G back?

http://smartphonematters.com/guides/how-to-change-your-iphones-carrier-from-tfw-15-7-back-to-tfw-15-6-for-straight-talk-and-net10-customers/ I had the same exact problem follow the directions and it will all be working. Speed for me almost doubled

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