Number tones do not work during a phone call. For example, when a call is made to a automated system the Visitor is asked to press 9 to allow access to open the gate or door. When pressing 9, instead of hearing the distinctive tone that 9 makes, it just makes a quick beep. Therefore no access is allowed.
iPhone 13, iOS 15
Contact your carrier about this. The tones that you are referring to are called DTMF dial tones (Dial Tone Multi-Frequency). These tones are transmitted by your carrier when you generate them on your iPhone. Contact your carrier and ensure that your cellular account has been set correctly.
Axel F.
Contact your carrier about this. The tones that you are referring to are called DTMF dial tones (Dial Tone Multi-Frequency). These tones are transmitted by your carrier when you generate them on your iPhone. Contact your carrier and ensure that your cellular account has been set correctly.
Axel F.
Number tones
