How to check the signal strength by using the Signal Bar or RSSI Indicator

Article ID: KB03024

Type: Support Content

Last Modified: 02-03-2012

 

Product(s) Affected:

  • BlackBerry 7 OS and earlier
Jump to: Environment | Overview
CollapseEnvironment
  • BlackBerry® smartphones
CollapseOverview

The signal strength on a BlackBerry® smartphone may be viewed in one of the following two ways:

  • Bars displayed by the network status indicator on the Home screen of the BlackBerry smartphone. See KB02142 for more information.
  • The received signal strength indicator (RSSI).

The following table compares the signal strength as indicated by bars to the RSSI strength indicators for BlackBerry Device Software 5.0 and later:

Signal Bar Strength Indicators

RSSI Indicators

5 bars (optimal strength)

-77 or higher

4 bars

-78 to -86

3 bars

-87 to -97

2 bars

-98 to -102

1 bar

-103 to -107

0 bars

-108 until data cannot be decoded

x

No Service



The following table compares the signal strength as indicated by bars to the RSSI strength indicators for versions earlier than BlackBerry Device Software 5.0:

Signal Bar Strength Indicators

RSSI Indicators

5 bars (optimal strength)

-77 or higher

4 bars

-78 to 86

3 bars

-87 to -92

2 bars

-93 to -101

1 bar

-102 or lower

x

No Service



Note: Greater, in dBm’s, would be a signal strength closer to -0 dBm.

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Visit the BlackBerry Technical Solution Center at www.blackberry.com/btsc.