Number of other users on the network

Connection speeds will decrease during peak hours on the mobile network. When you connect using a wireless broadband service using the shared data. This means that even if the data is secure "tunnel" network which is also used by other people. As more people go online and download to the tube, the speed of each user is reduced. It 'similar to the difference between driving on the freeway at 2 am against eighteen.

Strange as it may seem, the number of customers to make voice calls will also affect speed. This is because customers have priority over customers of voice and data network and customers during busy periods with voice services are allowed to access the network before the customer data.

Modem capability

Mobile broadband modems appear in a array of different speeds - from basal 3.6Mbps devices through to the fastest 7.2Mbps with abutment for high speed uploads. If your phone company offers 7.2Mbps broadband, but you've alone got a 3.6Mbps modem, you won't be able to hit the higher speeds.
Looking above aloof the speed of the modem, it's important to accede the technology central the modem itself. Of accurate accent is a technology alleged accept assortment - modems that support this affection accept two centralized aerials instead of one,making them a lot quicker, abnormally in poor advantage areas.
article source : http://www.fixya.com/support/r7760605-modem_capability