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
or
.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