Not having that problem with mine. Sorry.
But if three different phones are all producing this hum, it would seem that something else is going on. It would be highly unusual for three phones to have this very unusual issue.
Have you troubleshooted whether or not this happens at specific locations? Home? Work? Car? Some sort of interference?
Are you using a case on the phone?
Hearing aid? Pacemaker? Military installation? Anything like that which could be creating a problem?
I use life case, I work in construction so I need protection, it does it with cove on or off
Seems like bad batch my i phone 4 never did this . I used the same cover
BobbieO I am concerned that 3 devices all have the exact same proble. Have we had a chance to look at it in the VZW or Apple store? Are you using a bluetooth device?
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