Audio is the biggest issue in 3G2 files because most rely on AMR audio, a format built for early mobile networks rather than long-term playback or editing, using heavy compression that preserves only voice-range frequencies to work over unstable 2G and 3G signals, making it fine for calls but unsuitable for modern multimedia; as technology improved and codecs like AAC and Opus emerged with better quality and efficiency, AMR’s relevance faded, and due to telecom-specific standards and licensing l...

For 3G2 files, audio poses the biggest problem because they usually use the AMR voice codec, a format built for early cellular networks rather than long-term media use, relying on heavy compression that keeps only voice-range frequencies to travel over unreliable 2G/3G connections, making it fine for speech but not for modern playback; once faster networks and improved codecs like AAC and Opus became standard, AMR’s relevance faded, and many systems removed support due to telecom-specific standa...