NOOB with a question about missing radio band after installing CM10.1.3 topic

Sorry if this has been answered but I searched quite a bit and didn't see anything that looked similar! I flashed my Atrix HD to CM 10.1..3 because the phone is old and was slowing down. This was my fist attempt at a process like this and I figured it out and the phone is working great except I don't get LTE speeds like I was getting before. After a lot of research I think I know why but I can't figure out the fix. I checked my wife's phone (stock S3) by dialing *#0011# and her radio band is band 17. I went into my settings using *#*#4636#*#* and there is no Band 17 available. The only bands it shows is AUS2, USA, Cellular, PCS, Band Class 6 and Band Class 15.
Is there a way to enable Band 17 in Cyanogenmod 10.1.3???