HTC WM - Best all round smartphones on the market, often the leaders in mobile technology, make a lot of devices for other companies, best converged devices, works well with Microsoft due to the operating system compatibility. Excellent PDA functions. Built in Word, Excel, Powerpoint software.
HTC Android – High end Android devices, similar specs to WM HTCs, limited root access when bought through a carrier (eg. HTC Magic – Vodafone).

Samsung – Great specifications for the price, high tech LED screens, good multimedia compatibility, fantastic camera firmware, decent phones, decent battery life, have been known to overheat in a small number of cases, works best with the Symbian operating system.

Blackberry – Unmatched in email functionality, security and data compression. Can be expensive to run if your work place doesn’t have the proper software on their mail servers (BB support through carriers can cost up to $50 per month). Will not syncronise emails via cable, only calendar and contacts.

iPhone – Unmatched in browser capability and multimedia. Limited calendar and contacts functionality. Limited Outlook compatibility. Limited business use. Ordinary battery life. Can have issues with phone functionality. Very high end, compacitive screen.

If you’ve bought a Blackberry from Telstra or Vodafone, chances are that it’ll be software and hardware branded.
If it’s from Optus, there may be some software branding in the form of icons, but there will be no hardware branding.
NO BLACKBERRY IN AUSTRALIA IS LOCKED.
ALL BLACKBERRYS CAN BE USED ON ANY OTHER CARRIERS BB SERVER AS LONG AS YOU HAVE THE IMEI AND THE PIN
(located on the side of the box).