DTMF fix on S10? my dialtones in call not working

[mt27]

Has anyone got a definitive FIX for S10 vodafone DMTF or in call dail tones not working? 

[HenryTaft]

sorry I don't know

[Filtertip]

The only way that I can consistently get DTMF to work is to put the call on hold and then take it off hold. Having done that, the keyboard works.

[mt27]

I haven't tried that one before, but will do next time.   Do you know what Samsung's position is regarding their view on this issue?