Default [Q] force hspda?

does anybody know of a way to force the phone to stay on hspda? ive been searching of a way all night and only came across a old thread for modems for the galaxy s family(not just t959). im kind of iffy bout flashing modems for different devices to my baby lol. any insight would be appreciated. also if it helps im on cyanaosp 4.4 paired with fluid kernel.
DEVICE: Vibrant-T959
ROM: vanir_4.4.2.021214
KERNEL: Mackay_Kernel_0.609_cwm
RECOVERY: Cwm 6.0.4.7
THEME: Jb Extreme