Which Values (High or Low) are better in Android's getGsmSignalStrength()
Asked Answered
C

1

8

I'm playing around with reading the signal strengths in a small Android App, and was wondering if anyone has tested this (or just knows) of the documented values (0-31, 99) which value is better.

By asking which is better, I mean, does 0 represent no signal, or perfect signal.

I'm running an HTC Incredible on Verizon, so I can confirm the 99 is no GSM antenna, but I could not find any other items on GSM

Corrigendum answered 6/8, 2010 at 20:32 Comment(0)
G
37

The values are defined in the GSM standard TS 27.007, section 8.5 (Google it, or see here)

From the standard:

0        -113 dBm or less  
1        -111 dBm  
2...30   -109... -53 dBm  
31        -51 dBm or greater  

99 not known or not detectable

Which means - 0 is low, 31 is good.

Galatians answered 6/8, 2010 at 20:37 Comment(3)
Which means - 0 is low, 31 is good. is exactly what people need to knowBelldame
31 is 'red hot', rather than 'good'. When I used to be a GSM cellular radio planner, we used to plan for a signal strength of -93dBm (i.e., 10) or more at the phone. So, I'd say anything above 10 can be regarded as adequate/good - esp. for 3G and 4G technologies.Vaticinal
how to convert dBm to percentage?Tolson

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