In order iPhones with home button, you can enter into Field Test mode and see true signal strength. Then you can press home button to make the signal strength stay on phone instead of the bars.
enter field test mode: *3001#12345#*
but I cannot find a way to keep the dB instead of signal bars.
enter field test mode: *3001#12345#*
but I cannot find a way to keep the dB instead of signal bars.
