I have a really good friend of mine who is giving me his old iPhone 4 on Verizon since he is upgrading. For this being my first iPhone (but not first iOS device, I had a 4th gen. iPod touch and an iPad 2), what is the performance like on the iPhone 4? Are there any major bottlenecks I should be aware of? I mean, after all, he is just giving it to me. I plan on using it as a phone for driving, I have a Bluetooth stereo in the car I use, and for music. I also plan on playing some games on it (like GTA, I had Vice City on my old iPod before it was stolen), and also using it for social networks and FaceTime. To reiterate, are there any bottlenecks I might run into in doing any of the above? I already know that Siri is not available and same for dictation.