Remove Mobile Phone Pin Code Enforcement on Exchange 2010

EMC > Organization Configuration > Client Access > Exchange ActiveSync Mailbox Policies

Open Default, Password and untick “Require password”

Change number of rings before Voicemail

Dial this code to change the number of rings before voicemail:

Telstra:
**61*61101**xx#

Three:
**61*333**xx#

Optus:
**61*321**xx#

xx = time in seconds, up to 30.

Telstra example:
**61*61101**15#