Hi I recently installed an AVIC-F90BT but I am having trouble pairing my 3G iPhone with the unit. Can someone give me some advice?

What have you tried so far? Did you read the instruction manual on how to pair? Tell us the steps you take.

My guess is your missing a step somewhere, but without knowing exactly what your doing its impossible to give you some pointers.

My iphone 3g works perfectly and I hav eno issues with anything, so just provide that and ill point you in the right direction.

I just had to be patient with the pairing when it says watch your phone for instructions which prompted me with entering the 1111 code after the bluetooth displayed pioneer navi, thanks!