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We have an iPhone 4 with the latest iOS (4.3). When we receive MMS text messages from certain people containing a video, the video and audio are sent as separate files - in short, either the video or audio can be viewed/heard separately, not together.<br />
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What needs to be done to correct this? Are there certain video formats that the iPhone does not play/display properly?
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We have an iPhone 4 with the latest iOS (4.3). When we receive MMS text messages from certain people containing a video, the video and audio are sent as separate files - in short, either the video or audio can be viewed/heard separately, not together.

What needs to be done to correct this? Are there certain video formats that the iPhone does not play/display properly?

iPhone MMS Video/Audio Issue

The iPhone is a smartphone made by Apple Inc. It and the iPad, along with several other mobile devices from Apple, run on the iOS operating system, which has its own topic, as does the iPad for device-specific questions. Native iOS applications are written in Objective-C or in Swift using the Cocoa Touch frameworks or HTML5 compiled with the help of a package manager such as Adobe PhoneGap; a common IDE is Xcode.

iPhone

iOS is a mobile operating system developed by Apple; it is a derivative of the Mac OS X desktop operating system, with which it shares many (but not all) common frameworks and other components. These include Cocoa Touch, the Mach/Darwin/XNU kernel and code from the Berkeley Software Distribution (BSD). Each iOS application runs in its own secure sandbox to prevent altering other applications, the operating system, or any other data.

Programs written for the Apple operating systems are distinguished from software created for other operating systems in that it must be approved by Apple for use on its devices, whether it is from Apple (Final Cut, iWork, Keynote, Logic Pro and GarageBand are popular titles), or is a third party application from Parallels, Nuance, Microsoft and Amazon, among many others.