Dear Robert,
Thank you for contacting Samsung Customer Care.
If you are having problems with your handset since your firmware upgrade, I would recommend contacting Optus to organise to get your handset serviced, or you can send it directly to a Samsung Authorised Service Centre.
Please contact Samsung on the number below for details of your nearest Authorised Service Centre and to organise a Service Authorisation Notice.
If you have any further enquiries, please do not hesitate to contact Samsung Customer Care on 1300 362 603.
Thank you for contacting Samsung.
Kind regards,
Robert
Samsung Customer Care
http://www.samsung.com.au