Mobile broadband is a high speed wireless data service using 3G, which you can experience a fast download and upload of data when you’re surfing the webs on your mobile devices, such as laptop and cell phone.
With Internet tethering feature on your iPhone 3G/3GS, it can be used as a broadband modem for your laptop to access the Internet through USB or Bluetooth connection. Thus, you might need to check the data usage frequently for not exceeding the monthly bundled data given. For Singtel subscribers, you can check it by logon to Singtel consumer site and enter your mobile details. Alternatively, you can install SG BBOM on your iPhone.
SG BBOM is an Appstore application that is mainly for Singtel mobile plan with broadband on mobile value-added service subscribers to track the data usage on their iPhone. You’ll need to key-in your mobile and NRIC numbers and bundled data limit on SG BBOM application. It’ll display the estimated data usage you’ve used within a month and automatically be updated each time you launch it. I find SG BBOM is useful as I only need to key-in the details once and it won’t prompt for my details again on the next launch. But, sometime the data usage record on SG BBOM isn’t really accurate compare to Singtel consumer site.