AT&T Iphone 3gs Unlock and Jail Break

I have recently purchased a factory unlock for a AT&T Iphone 3gs, however it it is jail broken with Ipad 6.15.0 base band, to use Factory unlock do I have to down grade the ipad base band to a lower base band and then use upgrade the IOS via itunes
.upgrade the IOS via itune and will this upgrade take care of the base band.
Any thoughts people

geek_nomannz123, Mar 22, 8:51 pm