Knocking sound on iPhone calls

I have T-mobile and I hear it too! The first few times, I thought the person I was talking to was knocking on something in the background. However I’ve heard it more recently on almost every call I’m on.

I do. It annoys me so bad. I be thinking someone tapping into my conversation.

It has been a thought of mine that it’s a spy app put on my iPhone. It is very disturbing to conversations as it is quite loud sometimes.

Did it sound like clapping ?

Exactly what’s happened to me, TMobile, iPhone 12 max pro. Sometimes the knocking is soft. Sometimes it gets louder and different tones. Exactly what’s happening to you and as soon as someone makes noise on the other end or starts talking, it stops soon as it’s quiet it starts up again. I almost feel like I’m being spied on. Did you find an answer to help?

Yes! Mine also went away for a few weeks and it’s back! I have been to T-Mobile and called Apple tech to sort out the issue. T-Mobile was useless and the Apple tech tried for an hour to figure it out. The Apple tech even references this thread. He had no clue as to why it was happening and said it must be a T-Mobile issue. Do you have T-Mobile?

My Fiance had the same issue: him with T-Mobile, me with Verizon. I thought he was crazy, he said it was in his airpods and everything. I just switched to TMobile and the same thing keeps happening to me. Feels like a TMobile thing.

Same thing is happening to me and I recently switched to T-Mobile. Never had this happen prior to switching. Very annoyed.

I have T-mobile and an iPhone and I hear the hammering in the background when using my iPods. It’s so annoying especially since the other person can’t hear it.

I have been having this issue consistently for at least a month or so. I have an iPhone 14 Pro Max and I am with T-Mobile. I have been with them for years but just got this phone mid-May. Before that I had an iPhone 11. I think I only heard the knocking sound once or twice with that phone but I hear at lot with this one and usually only when I’m talking to my fiancé who has an iPhone 12 with AT&T. I heard it once when I was leaving my aunt a voicemail (she has an iPhone).

We did some testing and figured out that it only happens when he has me on speakerphone (same as jena25) and it usually stops when he starts talking. He doesn’t hear it but after I recorded the sounds (it comes in different volumes and pitches), he did remember hearing the higher-pitched sound once but thought I was doing something. When I first would hear it, that’s exactly what I thought, that he was just doing stuff in the background or it was his fan. Now that he and I are talking it through, I heard it a lot on the iPhone 11, but it was only at night. We stay on the phone all night long and while he was sleeping, I would hear it but I thought it was his heater or fan.

Yes, I still have it and it's actually gotten worse. I can occasionally hear it while I'm talking with someone and they are holding the phone to their ear. ( not on speaker phone). That being said it's only mildly irritating to me. It's not worth switching carriers.

I'm really not trying to be snarky but, what good "keeping this thread alive" do? It is highly unlikely that TMobile is paying any attention. As it seems to be a problem with their network, they are the only ones who can do anything should they decide to.

I think there’s a pretty good chance that this should be a class action law suit.

have no doubt that this is actually effecting far more people than those reporting it.

frankly it drives me nuts and by porting to Verizon - I was able to confirm that it’s T Mobile Network. BTW it also happens on Google Fi that is serviced by T Mobile.