At Sprint, only the aging Galaxy Nexus ships with Jelly Bean. Four (Samsung's Galaxy Victory, Galaxy S II Epic and Galaxy S III; the Kyocera Rise; the HTC Evo 4G LTE; and the Motorola Photon Q 4G LTE) feature Ice Cream Sandwich. Of those, Sprint has announced an ICS update for the Galaxy S III but not a due date. Eight others run Gingerbread.
T-Mobile doesn't sell any Jelly Bean phones yet. Of its Ice Cream Sandwich models (the HTC One S and Samsung's Galaxy S Relay 4G and Galaxy S III), the One S and the S III have Jelly Bean updates promised without a due date. Another eight models come with Gingerbread.
Poking around T-Mobile's site reveals ICS downloads for three of those eight: Samsung's Galaxy S Blaze, Galaxy S II and Galaxy Exhibit.
At Verizon Wireless, only the Galaxy Nexus runs Jelly Bean. Eight other phones ship with ICS: Motorola's Droid Razr M, Droid 4 and Droid Razr Maxx; Samsung's Galaxy S III and Galaxy Stellar; HTC's Rezound and Droid Incredible 4G LTE; LG's Intuition; and the Pantech Marauder. Verizon says it will ship Jelly Bean for the Razr M by the end of the year and, later, for the Galaxy S III. Another eight models ship with Gingerbread.