[android-developers] GSM signal strength "unknown" returned in Gingerbread 2.3.3

I have registered a PhoneStateListener and I am listening to
onSignalStrengthChanged(asu) and
onSignalStrengthsChanged(SignalStrength signalStrength).

On Eclair, these events correctly return the GSM signal strength in
asu, but on Gingerbread onSignalStrengthChanged always returns -1 and
signalStrength.GetGsmSignalStrength() always returns -99
(UNKNOWN_RSSI).

This means it is impossible to read the signal strength on
Gingerbread.

I tried my app on a phone with Gingerbread version 2.3.4 and it worked
fine.

Is this a known issue with 2.3.3? Is there a workaround?

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