I have the built in V60 phone with voice command. Is there a way to swap out or modify the cradle so I can use my V551?

I tried calling Motorola but they have absolutely no clue. I was told they had a "hang-up" cup available but they were out of stock and they had no idea if or when they'd get more in. He didn't know what would have to be done to install it.

Should I go see a tech in a mobile phone store?

__________________
2003 E500
2002 C230 Kompressor
1986 420SEL