One thing that the HTC EVO Shift 4G has that its big brother doesn't is the side sliding QWERTY keyboard, which helps promote the device as a 4G enabled handset for those who like to text. The problem, though, is that a bug is affecting the ability of MMS/SMS messages to be sent to the recipient. The good news is, next Monday users will be getting an update from Sprint that is like the proverbial can of Raid-it kills bugs dead. Although fairy tale endings don't normally occur in real life, after the update to v2.76.651.5, HTC EVO Shift 4G users will live happily ever after.
source: Sprint via AndroidCentral
An update to v2.76.651.5 for HTC EVO Shift 4G owners is coming August 8th