I am trying to make a call with a long number that looks something like this.
tel:883994555,,,32343#,,,#
with code that looks like this.
How I got this to work was to use ';' (semicolon) for the hard wait instead of the 'w', and ',' (comma) for the pause, and then encode the phone number first, like this -
Uri.parse(String.format("tel:%s", Uri.encode(number)))