Thank you for the additional information.
As a general guide, 1GB of data usage will let you:
Receive 1000 emails
Surf the web for 20 hours
Watch 5 four minute YouTube video clips
Download 20 four minute music tracks
Download 40 photos
Your usage of each service may vary. This guide is based on the following assumptions:
Email received at 100KB per email, web browsing at 30MB per hour, YouTube 4min video clip at 24MB per clip (standard 360p quality), music download at 4MB per track, photo downloads at 2MB per photo.
As far as TPG's records show, the usage was valid and registered to your account. It is not possible for anyone else to use your account as the NBN FTTN service is only available if connected to your phone line.
Please be informed that all Internet traffic to a PC constitutes as a download. This includes web browsing, movie/music streaming, chat, emails, gaming, program download, program updates, file transfers, etc. Generally speaking, anything that displays on your monitor whilst connected to the Internet is considered a download.
NBN FTTN technology is faster than ADSL2+, and being so, you are more inclined to stray away from your normal Internet usage. Factor this into the growing nature of the Internet, including more graphic intensive websites and multimedia; your download limit can be accumulated rapidly.
... View more