sometime loos connection with iphone3 bay BT. steering wheel interface not working with this radio

8 months ago, I went for a cheaper model and that is what I got. The sound is different. I immediately thought it inferior to the factory unit's sound. I have gotten used to it though, and now I think the sound is good but not great. The Bluetooth works great for calls except some times it has trouble doing phone functions and seizes up. The only way to fix it is to turn the unit off. I don't like the GPS. No free map upgrade when it was first purchased, and you have to go to another company's website to upgrade at all. It interrupts the music as many as 4 times for each turn which gets a little anoying. I don't like the way it searches for POIs or adresses either. Overall, I am not particularly happy with the unit, although I won't be replacing it any time soon. It serves its purpose and there are things I like about it. I do wish I would have spent a little more and purchased a better unit.