nexus s

[peters2009]

i had a nexus s and a nexus 4g one had a crack screen so i replaced it with the screen from the nexus 4g but i think i switch boards boards. because when i try to install a rom i always get a error. if i install a rom for sprint it installs i have stock ics on it with the radio for t mobile how can i get jelly bean on it or where can i get a stock jelly bean with the radio or wait to see if i get the ota update. i have no luck on getting the update over the air. any suggestion.