How do phone calls get through without the phone ringing

How do phone calls get through without the phone ringing. I was sitting right there looking at my phone and all of sudden a notification popped up saying that a call had come through but the phone didn't ring. I assume it has something to do with the call being a possible spam call, but other spam calls do ring. I'm confused.

iPhone 17 Pro Max

Posted on Dec 20, 2025 10:57 AM

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5 replies

Dec 20, 2025 2:06 PM in response to dnorth12

dnorth12 wrote:

How do phone calls get through without the phone ringing. I was sitting right there looking at my phone and all of sudden a notification popped up saying that a call had come through but the phone didn't ring. I assume it has something to do with the call being a possible spam call, but other spam calls do ring. I'm confused.

Turn off attention aware features off in face id settings.

Or that call lasted only a second where a call may have been made mistakenly and the person immediately hung up.

Dec 20, 2025 2:25 PM in response to dnorth12

Ringless Voicemail is a method that has been used for robocalls. Initially it was introduced to avoid call blocking and evade the Do Not Call registry as the voicemails were not considered calls. Later a judge ruled that voicemails were considered calls, but the technology still exists for robocallers.

https://www.usatoday.com/story/money/2021/12/01/robocalls-evade-crackdowns-using-tactics-voicemail-call-lists/8819857002/

How do phone calls get through without the phone ringing

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