Nokia 20 User Manual

Also see for Cardphone 2.0: User guide

Contents

Nokia 20 User Manual Manual pdf 19 page image

©2001 Nokia Mobile Phones. All rights reserved. 19Troubleshooting6. TroubleshootingFirst things to check1 Check that the data cable is firmly connected to the terminal and to the PC or other compatibledevice.2 Check that the power supply is firmly connected to the terminal and to an AC wall outlet.3 Check that the antenna is firmly connected to the terminal.4 Disconnect the power supply from the AC wall outlet before you check that the SIM card is installedproperly.Reception is poorIf there are problems with the reception, for example interruptions in the service, the signal may be tooweak. Check the signal strength with the following AT command in the HyperTerminal connectionwindow: at+csq.The response is +csq: , 99. The parameters for are:0 -113 dBm or less, poor coverage1 -111 dBm, medium coverage2...30 -109... -53 dBm at 2 dBm intervals, good coverage31 -51 dBm or greater, excellent coverage99 not known or not detectable