3G USB Modem – small, mobile, great for mobile professionals and laptop users. Only a little bigger than a flash drive (memory stick) and does not require an external antenna. Supports a mobile office for interent connectivity.
3G HSDPA router – best suited to desk top PCs and fixed work stations, high speed 3G internet connectivity.
Mifi – mobile wifi device that allows you to share a 3G connection with a 5 devices using wireless technology; 802.11b/g.
PC Card – relatively small and mobile, plugs into the PCMCIA slot on your PC. May require an external antenna in areas where cellular reception is poor.