What is best way to listen to Spotify in the car without 3G or using offline mode?

I want to use Spotify on my iPhone in the car but I don't want to use offline mode due to data usage constraints on my phone, so I want to stream music using the online mode. However some areas do not have 3G coverage so I was wondering if there are other ways to use Spotify in the car when you lose 3G coverage.

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  • Listen to offline music in iphone? Hi well basically I don't have aNotebook and I can't get one so I itunes is not an option! I tried I TUBE which is no longer available, even if it is available it takes way too much space Is there a music app where you can listen to OFFLINE music for FREE? I've tried most apps but they're not from YouTube they are uploaded by anons so the quality of the song is really bad and not all songs are there