DTMF Touch Tones not working iPhone 6 plus

This problem occurs because the tones produced by my iPhone6 are too long. Instead of producing 100-300 millisecond duration tones like they should, my iPhone produces tones of about 500-550 milliconds. This will occasionally trick the device receiving the touch tones into thinking it got 2 touch tones instead of one. Standard touch tone durations range from 100 to 300 milliseconds maximum.. In summary, our iPhones produce nonstandard length tones which cause devices such as your conference bridge to hear them incorrectly.

I have no idea what to do to fix this issue, except to get a different phone....but I love my iPhone :-)

I have this same problem. I never had the issue with my 6 Plus. Only on the 6s Plus. I blame force touch.

Any word on this from Apple? This has been a major issue for me since I got my 6S Plus. The only way I can get touch tones to work is to autodial them from FaceTime Audio continuity on my Mac, then switch the call over the to the phone. It does not even work when I click a conference call 'link' that is something like 877-555-5555,,1234567890# so the conference code should be dialed automatically without my touching the screen to send the numbers.

This is a serious problem that needs to be addressed. It makes my phone almost useless for work since most of what I do with it is dial into conference calls.

I have an iPhone 6 on which this is a HUGE problem. I cannot get access to work meetings because of the issue.

If I use Wifi Calling, the DTMF codes are not recognized. If I turn off wifi calling (which is NOT an option where I live) then the tones are recognized just fine.

This really does need to be addressed.

I'm having the same issue, when I dial into skype meetings. The skype system does not recognize the dial tones when I try to enter my meeting number. Any idea to fix this? Is this a software issue, a hardware issue, if I get my phone replaced, will I incur the same issue? I have an Iphone 6s plus, but the problem is similar to what you're experiencing, and I have spent countless hours trying to nail down what the problem is. I even reset ALL of my settings, including my password, and still not working.

My iPhone 6S Plus's touch tones cannot be "heard" over automated voice systems. So they definitely are not able to interrupt the voice on the phone system. And only SOME of the time are they heard when there is silence. Extremely frustrating.

I agree this is likely the main problem here, WiFi Calling - both my wife and I (she has a 6S+ and I have a 6S) have seen that issue last year already (I I just experienced it again) when calling into conference calls or activating credit cards and WiFi Calling is ON. The trouble stops after turning it off.

We're both with T-Mobile, but I'm not sure whether the issue is with iOS or TMO - Apple, any response?? This is a pretty substantial issue in my opinion as there are loads of scenarios where reliable touch tone is necessary.

The workaround I have found is to simply hold each keypress for a full second. The longer tones are then accepted by the system.

Thank you for the tip, I'll sure give that a try with the next opportunity!

This worked for me, thanks.