I have a '99 GS4 with a factory installed cell phone system, i.e cradle in arm rest, buttons on steering wheel, etc. I bought the car used and it didn't come with the handset (portable plus). How well does the factory system work? Are new or used handsets still available? Is it an analog system?

 

The stock cell phone is analog. Not really that great...if you get e new one installed make sure you use a Pro-Fit mount, it fits in between your radio and the dash, no drilling or dopey gooseneck fo the phone to sit on, perfect height and reach.