4s video interference anybody?

[sgrrsh26]

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I'm using an AT&T 4s and I'm noticing most of my videos are coming out with buzzing and ticking if I'm not shooting in airplane mode. Is anyone else having this issue?

 

[sgrrsh26]

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I really need to find out if this is normal or not. It seems as if my phone has a defect I should take it in.