Nexus S was the only remaining Nexus device to receive Jelly Bean and it seems Google has started rolling out the Android 4.1.1 update for the device as well. It’s the JRO03E build and currently works for Nexus S with model numbers GT-I9020T and GT-I9023.
The 114MB update should be available to Nexus S users via OTA or users can download the update directly from Google servers and flash it manually.
The Jelly Bean update for I9020A, D720, M200 should arrive soon.
I hope the I9020A update arrives ASAP