Optus the worst at $20/MB? Actually no, I'd say that Telstra is sneakily the worst, even though their headline rate is $15/MB. A few months ago they added a 50c session flagfall. What's a session? Basically a connection from your phone to an internet site that data is passed over. Your handset ...

RIM negotiated (long ago) special BlackBerry data rates. Maybe your Telstra/Optus plan doesn't reflect that, most do. AT&T quickly withdrew its unlimited roaming offer when they lost lots of money on it.

As well as being miserly with data, "Blackberry data" - mostly e-mail traffic - is billed at (much) lower rates than non-BlackBerry data, meaning that roaming with a BlackBerry handset for e-mail is actually quite cheap (including the compression/other usage reduction as well). Typically less tha...

Ahem... not quite. Telstra also charges 50c flagfall per data-session, so add another $3 to your six voicemails...

TravelSIM? Prepaid. vRoam? Postpaid. Big difference. TravelSIM? Estonian number, so huge cost to call it. That's actually how they make their money. Plus of course credit wastage from unused credit... vRoam? Your normal Australian number. Oh, and watch out for scams: https://www.executivet...