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My Nokia Lumia 520 running Windows Phone 8.1 Update produces a system alert sound whenever I complete a call (because I am on a pay as you go plan - the alert text indicates the cost of the call). The alert produces a sound that is the same as the sound named "Nokia message." Unchecking "System alerts" in Settings -> ringtones + sounds does not prevent the alert sound. Changing the sound set in Settings -> notifications + actions -> Phone has no effect on this particular message. I haven't been able to find what setting to use to change the sound played for these alerts.

How can I silence or change the alert (or message?) sound?

(The alert/message is not a text message - a record of it does not appear in the Messaging app.) (Carrier is Airvoice Wireless MVNO on AT&T network.)

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  • You say the alert is from a text? If so, you should be able to add the sender to your contacts and assign it a custom text alert tone.
    – Indrek ♦
    Jan 27 '15 at 17:46
  • @Indrek No, it is not a text message. It is a full screen message (like the phone equivalent of a windows MessageBox?). A record of it does not appear in the Messaging app. Changing the sound at Settings | notifications + actions | Phone has no effect on this alert/message.
    – sean e
    Jan 27 '15 at 17:58
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    Unless someone corrects me on this, I'm guessing that the message is being pushed by your carrier, so there's no way to change it.
    – RareNCool
    Jan 27 '15 at 18:10
  • @Drowin I don't doubt that the message is being pushed by the carrier but I don't think the sound is pushed by them with the message text.
    – sean e
    Jan 27 '15 at 18:12
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    @seane Whenever I get a message that isn't sent by the OS, the Nokia Message sound is the sound it makes. So I think that it is a preset sound that the OS uses when it doesn't know what the message is, specifically. Which would make sense, since it's a Nokia phone, and it's a message... (Nokia + message = Nokia message). Again, if someone knows differently, please correct me.
    – RareNCool
    Jan 27 '15 at 19:01
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AFAIK, there's no way to turn off USSD tones.

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Try if this will work:

  • Choose the Ringtones+Sounds option in your Settings
  • Scroll down to the bottom of the Ringtone+Sounds page until you find the “Manage App Sounds” button bar.
  • You will see options to choose your Quick Action button and just below is a listing of apps that support custom alert sounds.
  • Tap "Store"
  • Set Notification sound
    • None to be silent

Source

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  • Nice try, but I already have Store set to None. :(
    – sean e
    Feb 10 '15 at 15:42

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