*Important--iPhone4s Static/Crackling Noise

I had same problem from 3 days i came home and i just clean my iphone earpiece with tooth brush and now its working fine. Try this method and let me know whether its my luck or it really works.. And after that just make your volume level full and decrease by 3 bar and try it.

Good morning everybody,

tfsimoes,

you bought your iphone in physical store or via apple store? And how did you get exchange or get your money back?
Thank you.

I have had no such problems on my 4s. The phone was given to me by my son, who got it new when it came out about a year ago. I had to put a new SIM card in but calls are fine.

No clue why you would post saying how your phone isn't affected. That gives others no help at all and is really pointless. There is a major problem with a lot of these phones, so your comment is just idiotic to me...

I replied because an original post ASKED if there was anyone who didn't have the problem. So sorry for offending you.

please see thread https://discussions.apple.com/thread/3393647?start=915&tstart=0, it lists a similar issue (no solution though)

Replace the metal SIM card bracket with plastic brackets and everything is OK. Why?

Because the pins of the SIM card touch the metal bracket, and therefore there is contact - a short circuit. Because it creates Static / Crackling Noise.

Today I've cut the SIM card into Micro, but I was still a little cut, so there is no contact with the metal bracket. Doing everything without problems. In the original micro SIM card (can see) contacts touch metal bracket and then creates a Static / Crackling Noise.

For me it's all right now. No More Static / Crackling noise and the sound is immaculate and clean.

Nice greetings from Croatian!

Well Hi there,

Even if its 2016 and the 4S seems pretty old, softwarewise its still up to date and thats why ive got myself one and it actually have the very same issue!

So i just wanted to find out how that comes.

The first thing i can tell you, it seems like not every model of the 4S is affected, ive got a MD235D/A and it definetely is!

However there are quite a few different models of the 4S and all of them got slightly different components on their logicboards!

So as it just seems some logicboard models got components that causes noise emission of the voltage regulator inductors!

I dont know if theres another PMIC that switches harder, worse capacitors oder just inductors made of "noisy" ferrite..?

But we do know now that the only solution is getting another iPhone Model and that the noise is emitted by the switching regulator inductors and its completely harmless!