^+1.For sure the original, the innovation that it created in the industry is undeniable.
iPhone 4 for me was the best release. That's why I'm still using it with no desire to upgrade at all. I have thoroughly used the iPhone 4s and 5, and I am not impressed after these 3 years. There were no major changes that interested me. Local VoiceControl without the need to use Siri is a big deal for me (only the iPhone 4 has it; although, you can put back with jailbreaking). Retina display is still great; have changed the battery for a brand new one two months ago, so I still have all day battery life - and the speed is more than decent for me even though it's jailbroken and FULL of fun stuff.iPhone 4. It was the last version that made a significant change to the iPhone, which is why I didn't upgrade to the 4S or the 5.