yes iPhone is not that best audio, but the playing it thru Mydlink Lite app is quite useful
my personal experience audio playback on iOS Mydlink (via 4G or wifi), based order
5020L - clear and loud audio, can hear outside room noise too.
thumbs up for this5222L - clear and fine audio.
thumbs up for this960L - acceptable audio, needs headset to clearly hear if you are in bus or train
942L - I have 3 of these with different purchase date in span of 2years. unusable audio, needs headset, there is always static after several firmware
932L - it died on me less than 18 months. audio is same as 942L
my next purchase plan is maybe the 5030L as it is a new model, so an audio review is nice