Depends on phone and your carrier's service.
With my old iPhone 3GS, traveling long distances and Internet radio was a frustrating experience as the signal was either nonexistent or would drop often.
How ever, with the 4S, only dropped twice in an 8 hour journey from Nashville to Chicago a few months ago. Amazing really. The antenna design in the 4S is vastly better. I wish I had other phones to try but I'm not going to spend all that money to find out. lol
With my old iPhone 3GS, traveling long distances and Internet radio was a frustrating experience as the signal was either nonexistent or would drop often.
How ever, with the 4S, only dropped twice in an 8 hour journey from Nashville to Chicago a few months ago. Amazing really. The antenna design in the 4S is vastly better. I wish I had other phones to try but I'm not going to spend all that money to find out. lol