"I've talked about Android fragmentation here before,
particularly about how various people view it as a major concern
(IT professionals mostly along with some developers) while others
(including most Android users) see it as a non-issue. Everyone,
however, can agree that most Android updates bring new features,
bug fixes, and security patches with them – all good reasons
to look forward to updates arriving for your Android device over
the air from your carrier.
"A new wrinkle in the update and fragmentation story emerged
today. AndroidSpin is quoting an unnamed T-Mobile employee as
saying that the carrier is being told not to release the Android
2.2 update (Froyo) to customers that own the Samsung Vibrant. The
reason: to increase sales of the new Vibrant 4G."