There are various factors that might affect the connection and speed.
- the websites and servers you are accessing
- the types of applications being used
- the radio conditions (signal strength, electrical interference, distance from network site)
- the level of congestion on the Internet (There are certain times of the day or during certain events in which internet traffic is very high)
- the level of congestion on the 3G broadband site (number of people online/on network)
Please leave your contact details over at http://bit.ly/StarHubCares and let me assist you further on your issue.