[Q] Force Note II to stay on one frequency topic

I recently took up the T-Mo deal to switch from VZW. My mom kept her Note 2 and I rooted it and got it working on T-Mo with H+ and Edge. The issue I see is that it bounces from 3G to H+ every few seconds, What can I do to force it to stay on one band? Or even just limit it to 2 bands?

I tried Phone Info, but it force closes. It's running the Stock Rom 4.3 with a locked bootloader.

Any ideas would be appreciated. Thanks!