I am having the problem that the hash sign is truncated. Does anybody know a solution? using unicode or %23 is not working in my case. Now the number that is dialed is *101
String uri = "tel:" + "*101#";
//String uri = "tel:" + "*101\u0023";
intent = new Intent(Intent.ACTION_CALL, Uri.parse(uri));
Found a solution: String encodedHash = Uri.encode("#"); this did the trick...