Since the Nexus S, Google brought out the Galaxy Nexus, Nexus 4, and Nexus 5.
There are only a few differences between a Nexus S and a Nexus S 4G. Nexus S is T-Mobile phone, while the Nexus S 4G is a product of Sprint's Samsung. The only other major difference is that the 4G version offers Google Voice.
Nexus S was created on 2010-12-16.
It never did, but it did get the Galaxy Nexus, which had a number of improvements over the Nexus S.
The Nexus S 4G is a CDMA phone and the Nexus S is a GSM Phone. This is the basic difference between these two phones. Most of the remaining configurations are same.
The Google Nexus S is from T-Mobile and Sprint.
The Nexus S is going for about $450. $200 with a two year contract.
The Nexus S came in both CDMA and GSM variants.
The Nexus S is no longer manufactured. The newest Nexus phones can be bought and used on the Sprint network.
No
It was manufactured by Samsung.
If you can manage to get an unlocked GSM version, that could be possible. I believe that for a brief period, AT&T did carry a Nexus S.