My phone 3 years ago had an antenna that plugged into the bottom where the power cord also plugged in. I bought a double sort of plug so I could do both functions in the vehicle.

My new Sanyo phone has a short pull-up antenna but to insert the external antenna you need to unscrew the short antenna and screw in an adapter into that port. Not a quick connection and I only do it when I am in poor reception areas.

I do keep track of the sites in remote areas that for some strange reason have good reception. Often I may drive 20 kms to get to the spot we call "Telephone Rock" only to find other people there doing the same thing.

Mike