Cannot use IVR systems or log in to conference calls: T-Mobile myTouch by Huawei

Troubleshoot or learn more about [insert device issue symptoms, a description on what the phone may display, any error messages and or device tip description. Add additional info about why the issue occurs if available.]


To fix this issue:

  • Software version affected: C85B837SP01


This has been corrected in the ltest sowfteare version.


To successfully enter DTMF tones required to use IVR services or to log in to a conference call, perform the following actions:


  • If using Wi-Fi Calling and Speakerphone mode, turn off Speakerphone mode before entering the IVR selections or conference call login code. Once successfully connected or logged in to the conference call, turn Speakerphone mode back on.
  • Turn off Wi-Fi Calling before initiating the call. If Wi-Fi Calling is disabled and the call connects via cellular service, Speakerphone mode can be left on throughout.


For additional DTMF troubleshooting, please refer to: h