Troubleshooting guide

Connecting to GSM Networks
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Accelerated Profiles
Accelerated connections utilize in-network acceleration/compression
technology to provide a faster connection experience.
Data acceleration can result in reduced graphics quality. If you are
using your accelerated profile and wish to reload a given web
page with full quality graphics, do the following:
• Microsoft Internet Explorer users can press CTRL + F5 (or
hold CTRL while clicking the RELOAD button on the
browser).
• Netscape users can press SHIFT + Reload.
If you experience difficulty with your connection while using an
accelerated profile, disconnect and try connecting with the
unaccelerated profile.
For more information on connection profiles, please see Network Profiles.
About GSM signal strength
The signal strength of a GSM network is expressed in the main GSM user
interface as both a series of bars and as a numerical value (in dBm). A lower
numerical value means “better signal”. For example:
• -60 dBm is an exceptionally strong signal
• -70 dBm is quite good
•
-80 dBm is satisfactory
• -90 dBm is a weaker signal with reduced throughput
•
-100 dBm is a borderline unusable signal level
• -113 dBm indicates a "no signal" condition
Cellular data is a line of sight technology. Obstructions between the cell
tower and you “attenuate”, or weaken, the signal strength. Often signal
strength can be improved by moving slightly, approaching the windows of
a building, or laying the antenna down flat away from the laptop LCD.
If you are moving while connected, your wireless connection may drop if
signal is lost (approaching -110 dBm). Prior to losing signal your wireless
device should start to scan for a stronger signal from a roaming provider in
order to improve the performance of the connection. If your device