Loud crackling static sound on iPhone 5 call?

Sounds like a problem with the mic on the dock connector that used during calls

The upper mic is used to record in voice recorder

Replace the dock and see if this sorts it

Reemplazo de conector Lightning y toma de auriculares del iPhone 5

iPhone 4s with same issue. I solve it by holding in the power button and back button together and power off and keep them pressed till apple logo appears. This resets the phone and all is good now

I am having the exact same issue, Replaced the doc connector and now sometimes it will be fine, and sometimes it will still crackle. If I turn on speaker mode and turn it back off during the phone call it will resolve it temporarily. I have also replaced the actual ear speaker.

Any further advice?

I work at a mall kiosk where we've repaired too many to count.What I found not sure if it helps but I had the same issue with the crackling noise. What fixed the issue for us turned out to be the charge port connector. It turned out since it was a new charge flex we replaced since the connector when they're new doesn't have as much give or hasn't been broken in. What I noticed is that it being stiff it caused the connector to slightly become raised/lifted from the connector. What I did was not put the sticky part underneath the flex cable down onto the mobo and simply connect the cable. Voila it all worked no static. Happy customer, hope this helps

Hi Have had the same issue on a 5c , replaced screen and top speaker and still the same but on further examination we found a screw had come loose and attached to the magnet on the main speaker causing feedback

SOLUTION - After all that has been said I would like to suggest the most common cause of this issue. This issue will regularly occur when the charging port flex connector is replaced. In this case the crackling may be caused by a grounding problem between the top of the charging port flex connector and the metal screw panel. The top of the connector must be insulated from the screw panel that secures the ribbon cable onto the logic board. This can be accomplished with a small piece of electrical tape.

Did it work? I am having the same problem here... the problem is this static sound only happens every few days...

Same here. A caller hears crackling during the ringing before I even answer. I want to know if replacing the lightning dock assembly worked.

When I call out to a friend via my iphone, it crackles while it rings, so I hang up. It is the strangest thing. Not sure yet how to fix this problem.

the loud crackling in from blocked speaker .... sound can't exit so the sound is bouncing off of clogged mesh..... all you have to do is change the mesh that the speaker is facing and its fixed. I changed the speaker but noticed when i tried to make a call it echoed but when i had the phone open and speaker slightly slanted not pushed down it sounded clear so i checked the mesh and it was clogged and full of filth after that it sounded clear.

Change the mesh or remove the mesh and test connection this isn't hard ware lol this is simple clogged mesh that sound cannot escape

Pedro - iTechiie Solutions

I just replaced the screen of an otherwise working i5S, and got a crackling/distortion in the earpiece after reassembly. Replaced the earpiece speaker but no change.

Discovered that the sound was fine when the screen was "loose", on top of housing, before pressing it inside the frame. So apparently something is being "jammed" when putting it together.. Cant see anything "abnormal", and have tried cleaning all contacts etc...

What could possibly cause this i wonder..?

iPhone 5C headset with static noise.

Tried different headsets, still static.

Tried brand new port, still static.

I have the same problem. If I plug in ANY headphones all I hear is static. Same if I try to make a call to anyone it's all static. My microphone doesn't work either but FaceTime is fine.

Restart your iPhone and see if it will work after. Works for me. I have and iPhone 6.

I have the same problem with brand new iPhone 6 plus, facetime and third party call app works fine only with cellular network i hear the static sound, I've tried every reset/restore. Apple dealer did hardware diagnostic and everything tested fine. SIM card woks fine on other device. So my guess it has to do with intervention between earpiece speaker and antenna. I had no accident with my phone, and it was working perfectly for 4 months before this happen. any advice? I tried changing speaker and cleaning the mesh, not working!!

Very late to the crackly iPhone party, but I thought I’d share my experience for people having similar issues (and seeing as this thread seems high up in Google’s search.)

I’m running an old iPhone 5c. The screen broke, so I replaced the screen, swapping the earpiece and camera out from my old one, and replacing the ropey old battery while I was in there. Put the phone back together and everything was working fine except for making calls where there’d be the most annoying static, crackling, modem noise. Sounded like it was badly grounded. Also I found that the phone would heat up excessively during calls (-only calls, not during any other processor-heavy task).

Tried a hard reset/restore but still had the same issue. I could receive calls fine on speaker phone but not through the earpiece speaker.

In a final act of desperation I removed the screen from the motherboard and unscrewed the metal earpiece assembly on the back of the new screen. While I was doing this I noticed that one of the thin insulating foam pads on the back of the proximity sensor ribbon cable had slipped/perished slightly and so it had been touching the back of the metal cage holding the earpiece in place. I cut a new square of electrical insulating tape to cover the exposed metal patch on the cable. I also noticed two exposed patches of metal behind the connectors on the two ends of the cable that connect this cable to the motherboard, so I cut tape to cover these too. I reassembled the phone and tested a call. Beautifully clear speech with no crackles and the phone stayed cool to the touch. Sweet!

This photo shows the cable as I initially found it, without the new insulating tape on. Above photo is the exposed metal that I believe was causing the main problem. Bottom photo shows the exposed metal on the back of the two motherboard connectors that I covered for good measure.