The Samsung Galaxy Nexus has been available on the Sprint network for a few months and I now have my hands on one (to test). I'll be providing more opinions over the next week, so stay tuned. In the meanwhile, if you're thinking about upgrading to an Android smartphone running Android 4.0 (also known as Ice Cream Sandwich), then you'll be happy with the changes that you'll find on the new OS. Compared to Android 2.x, Android 4.0 includes a number of welcome improvements. I actually still have an HTC ThunderBolt running Android 2.3.4 that was the first 4G smartphone on the Verizon network. This phone is supposed to get the Ice Cream Sandwich update sometime this month, so I'm waiting to see how it performs after I've updated the OS.
Back to the Samsung Galaxy Nexus - it's a really nice, thin smartphone with a large 4.65-inch, 1280-by-720 Super AMOLED screen. Ever since I started using an iPhone 4S, I've missed the larger screens found on Android smartphones. The dual-core 1.2GHz processor is snappy and the battery life has been impressive so far.
The newest Android smartphone from Samsung is the Galaxy S III and it's going to be available on most of the major wireless networks. Being the newest, it's also the most expensive. The Galaxy Nexus (also from Samsung) is a bit more affordable ($149.99).