Dial tones / digits are not recognized by automated operators.

[ilya82]

I am unable to enter my password code (4 digits) when calling, for example, to operator voice mail - get a "wrong code" message. I noticed, that any time I need to dial more than 1 digit, i get this error.
Another example - I needed to enter my phone number during the call to phone operator - got the "wrong number" message.
Issue was seen on HTC Desire Z and Samsung Galaxy S.