If you're a Telstra customer and go to Hong Kong you'll be able to use 4G data. And be careful.
Until this agreement was in place, even if you had a 4G capable handset like the iPhone 5 or Samsung Galaxy S III, when you travelled you mobile data coverage dropped back to 3G.
Our sister title iTnews reports that the first deal is with CSL, which is part owned by Telstra, and is a mobile phone carrier in Hong Kong.
Telstra is also seeking agreements with other telcos around the world for 4G global roaming rights.
This is good news you depend on fast data access while traveling, although there's no light at the end of the tunnel when it comes to pricing.
The 4G roaming is charged in the same way as 3G. iTnews reports that roaming data is charged at 1.5c per kB or $15.36 per MB plus a 50c set up fee per session downloaded.
That's a hefty $15,360 per GB. In contrast, we're currently on a $59 per month phone plan that includes 1.5GB of data.
We've discussed mobile phone bill shock before but it's still an issue and one that can cost businesses significant amounts of money.
We recent reviewed the phone bill with a consulting client and saw charges in excess of $10,000 for mobile data for a couple of traveling staff members.
Although ACMA released five tips for reducing bill shock when global roaming it remains a significant issue.