We have 5 Iphones on our. Most of them are on 2nd or 3rd generation, one of 4th. Then I see I can get an Amazon Fire for $30- no contract. Why is this a bad idea compared to $700-$900 for Iphone plus service contract, etc? Is it really that bad? Okay, it is actually $130, but you get one year of Amazon Prime, or extension, meaning it is still $30. Damn cheap Help me understand it.