There is a free app that manages those settings. It's rated fairly highly. I have no personal experience with it.
Google play - Tweakker
Worldwide Internet and MMS APN settings - Tweakker is the best APN manager tool that helps you set up your APN settings - Access Point Name - for internet and mms connection in 3 easy steps:
1. Select your operator or provider
2. Select your subscription or plan
3. Tweakker sets up Internet & MMS APN
Ice Cream Sandwich is not supported at the moment because of Google's modifications. We are working on a solution.
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