Apple iPhone 4 (16GB - black, Verizon Wireless)

Pros: Polished OS
Intuitive User Interface
Easy Application Management
Touch Screen
Battery Life

Cons: Lack of Customizations
No Home Screen Dashboard
No Flash
No Dual Mode GSM/CDMA Network Capabilities

Summary: I have been a Verizon wireless customer for years due to the lack of customer service from Att&t, but that is for a different review. As with any phone, the iPhone has its pros and cons. Prior to receiving my iPhone I had an Android phone and I think both OSes are great.

I prefer the IOS over the Android because it is polished and the applications do not become memory hogs. With my Droid, I had to manually perform application/system management to extend battery life. Often, with my Droid, I would find my battery drained in a matter of hours and unusable as it sat on the charger. In my opinion, the battery life helps push the iPhone ahead of the Droid.

The iPhone is not as customizable or as flexible as the Droid. Apple is very conservative with its technology and is never on the bleeding edge. Apple is also very restrictive with third party application support such as Flash. What this means for the consumer is a very stable and polished OS.
Bottom line was I wanted a polished and stable OS that I could use with my current iTunes Media library without the need for third party applications for media management on my phone. I also wanted the phone to be compatible with my e-mail and calendar while providing good call quality. The iPhone delivered on all my requirements.

If you want bleeding edge technology with a highly customizable OS AND don't mind a minor glitch every once in a while, then I would recommend an Android based phone.

As far as 4G is concerned, we are a few years out before it is widely available. The issue with data and voice at the same time doesn't really bother me personally, because I don't multi task on a phone like that. The lack of GSM support is a minor issue, however it is cheaper to use a rental/prepaid phone while out of the country than pay for international roaming.