I want to throw this out to the community. I'm going through my first iPhone upgrade as I am replacing my current iPhone (Original 8gb, 2G/EDGE) with the new iPhone 4. What I want to know is what should I do with my current iPhone? I went through the process at Gazelle.com where they will give me $83 for my old phone which is better than me trying to sell it on eBay or Craigslist. But what I want to know is if I were to keep it, could I use it as a backup phone if I were to lose or damage the new one? Let me know what you think because I want to explore all my options.