My HTC One S refuses to dial telephone numbers entered in the common UK formats:
+44 (0) 20 1234 1234
or
+44 (0) 1865 123 123
This is a MAJOR problem as most of the UK numbers on the web list with the bracketed zero "(0)" and the organisation I work for has thousands of contacts with this format - all of which I cannot dial. My Blackberry handles both +44 20 1234 1234 and +44 (0) 20 1234 1234 formats correctly. Come on Android (if it is in fact an Android problem) get your act together and handle bracketed numbers correctly.