Default [Q] Bionic HW C/T mobile sim

I've read countless hours of post on here and no one ever seems to elaborate on what's up with the Droid Bionic HW C. It's an older phone and I picked one up about 2 weeks ago to use with Straight Talk and my I've followed all suggestions to a T with really no luck as far as using a T mobile sim card in one of these model C bionics. Pretty sure that it can't be done on a C with Tmobile. Heard ATT sims work fine though?

Got about 60 hours of rooting/factory resetting/rom'ing/Radiocomming/RsD liting and still haven't been able to use this

Really hoping someone can help me out. Thanks