I have a midland un-tuned with a 4', can't remember brand name antenna(got it from bills truck stop) just bolted on to the side of my zj and I don't have any problems talking to anyone. Whether I'm on the trails or on the highway. I also take that same unit, swap it over to my wife's Durango hooked up to a magnetic antenna on the roof and do just fine. Never had any problems.
Only problem I have ever had was a hand set go out on me.
Sent from my microwave using a teleportation device.