DTMF not working with automated systems: visual voicemail the culprit!

teachdb

    I purchased the Note 8 and the DTMF settings could not be changed. After calling t-mobile and being redirected to Samsung where they said I would need to use my phone in "safe mode" (what's the use of having the phone then?) I started deleting apps one by one until I found the cause; T-Mobile's visual voicemail app. now my phone works perfectly with automated systems. The problem now is, I need to have visual voicemail for work. Does anyone know if there is a way to have both?

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