Mystery Solved: AT&T Carrier File Update 5.6 for iPhone Did What Exactly?

Along with iPhone 3.1.2, AT&T users received a 5.6 carrier file update, but the reason(s) for it weren't clear. MMS was already enabled, and tethering was nowhere in site, so what was it for? Well, iPhone Savior sat on the phone with Apple support long enough to find out! Turns out, it fixed an MMS bug:

When sending photos or videos in an MMS message, the progress bar would stall at about 90% then result in an error ending with a (!) red exclamation point next to the MMS message. The associated message failed to be properly sent, though standard text messages worked as normal. The 5.6 patch addressed that particular MMS issue.

Anyone out these have that problem prior to Carrier File 5.6? And if so, did it fix it for you? Let us know!

[iPhone Savior via Gizmodo]

Rene Ritchie is one of the most respected Apple analysts in the business, reaching a combined audience of over 40 million readers a month. His YouTube channel, Vector, has over 90 thousand subscribers and 14 million views and his podcasts, including Debug, have been downloaded over 20 million times. He also regularly co-hosts MacBreak Weekly for the TWiT network and co-hosted CES Live! and Talk Mobile. Based in Montreal, Rene is a former director of product marketing, web developer, and graphic designer. He's authored several books and appeared on numerous television and radio segments to discuss Apple and the technology industry. When not working, he likes to cook, grapple, and spend time with his friends and family.