the number means Signal strength is a number ranging from roughly -50 to -105 (your phone may show as a positive number). Closer to zero means a better signal, i.e. -50 (roughly full signal) is better than -105 (roughly no signal.
Apple iPhone 2g, 3g and 3gs – firmware 3.1.3
In phone mode dial *3001#12345#* then press CALL. The Field Test Screen will appear. The signal bars will now display the signal in a dB reading. -51 is full signal, -105 is no signal. When testing phones in a 3G environment it is possible to determine the frequency being used by selecting: UMTS Cell environment, then select UMTS RR info. The screen displayed will list the Uplink and downlink Frequency in code form. Uplink frequency on the 850 MHz cellular band will list an Uplink Frequency code between 4132 and 4233 and a Downlink Frequency code between 4357 and 4458. If you are operating on the 1900 MHz spectrum the Uplink Frequency code will be between 9262 and 9538 with the Downlink Frequency code being between 9662 and 9938.
Audiovox 8300, 8500, 8600, 8615
Press ##2773 then press the END key. Scroll down and select DEBUG. Signal strength is the 4th line down. (For example Rx: -87). To exit, press the END key again.
Audiovox 8900, 8915, Pantech PN-3200
Press ##27732726, press END key. Scroll down and select DEBUG. The signal strength is the 4th line down. (For example Rx-96)
Audiovox 9100, 9155
When phone turns on, as soon as green light shuts off, press FCN (right arrow) and 00. It will ask for FSC Code. Press 000000 (six zeroes). Press OK. Highlight DEBUG SCREEN and press FCN, FCN. Signal strength is the top right number. On 2nd line, if the letter is upper case (for example, “A”), then the phone is on the 1900MHz band. If lower case (“a”) it is on 800MHz. To exit test mode, turn off phone.
Audiovox CDM-9900
Power the phone off and then back on. Quickly press MENU, 7, *, *. The FSC Code is 000000 (six zeroes). Press SELECT Key (middle button). Select DEBUG SCREEN. Select NORMAL. Signal strength is on the second line after RX. You may have to dial a fake phone number to get the Rx level to update. Press POWER OFF to exit.
Audiovox (UTSTARCOM/HTC) PPC-6600, PPC-6700, XV-6700
From the phone screen, press ##33284# or ##33284 and press DIAL. Signal strength will be after RSSI or RX level.
Blackberry
Press TOOLS, SETTINGS, STATUS or OPTIONS, STATUS. This feature is also available on GSM models. The top line is the signal strength in –dBm. GSM and iDEN models also have this feature.
HP 6315
Click on START. Select SETTINGS from the drop-down screen. Select SYSTEM tab at the bottom of the screen. Scroll down to SELF TEST and select. Unmark all option boxes except GSM/GPRS and click START. When the phone displays GPRS CONNECT NOW? Select NO. The 8th line down displays Signal Strength. Click REFRESH to update Signal.
HTC EVO
Select phone application and key in ##33284# and press “call” to enter field trial mode. Select the network that you want to see signal information for (“1X Engineering” = 1xRTT/2G, “EVDO Engineering” = 3G, “WiMAX Engineering” = 4G). RSSI is shown under “RX Power”. To exit, press the home button.
HTC Wizard 8125, 2125 (AT&T/Cingular)
Enter *#*#364#*#* and your phone will enter test mode. Signal strength follows RSSI. Number shown is not –dBm. Strong signal is 31 (approx -50dBm), weak signal is 4 (approx -105dBm). The higher the number, the stronger the signal. Press END or DONE to exit.
HTC 8525, (AT&T/Cingular)
Enter *#*#364#*#* and your phone will enter test mode. Signal strength follows “RSSI 1” and displays –dBm. Press ok to exit.
HTC DASH, EXCALIBER, S620 (T-Mobile)
Enter *#*#364#*#* and your phone will enter test mode. Signal strength follows RSSI. This test mode does not show –dB. Strong signal is 31 (approximately -50dBm), weak signal is 4 (approximately -105dBm). The higher the number (31 vs 4) the better the signal. Press END or Done to exit.
HTC Touch
##33284#
Kyocera 2035, 2135, 2235, 2255, 5135
Press 111111 (six ones). Select OPTIONS and press MENU (the upper right hand star button) or OK to select it. Select DEBUG and press MENU or OK. Enter field debug code: 111111 or 000000 (six ones or zeros) or 040793. Scroll down to DEBUG SCREEN and press MENU or OK. Scroll to BASIC and press MENU or OK. The signal strength is the last number on the 1st line. To exit the field test, select CLOSE and press MENU or OK.
Kyocera KX1 (SoHo), KX2 (Koi), Kx16 (Candid), 7135
Press 111111 (six ones). Select OPTIONS, scroll to SERVICE and press OK. Scroll down to DEBUG and press OK. Enter 000000 (six zeros) and scroll to DEBUG SCREEN, press OK*, select ON and press OK. Press NEXT and the signal strength is on the 2nd line (for example, Rx: -87). To exit, press END and follow beginning instructions to * and select off.
Kyocera K9, 47, 414, 424, 434, 484, 494, 1135, 2325, 2345, 3225
Press 111111 (six ones). Select OPTIONS and press OK. Select DEBUG and press OK. Enter field debug code: 111111 or 000000 (six ones or zeros) or 040793. Scroll down to DEBUG SCREEN and press OK. Scroll to ON and press OK, OK, OK. The signal strength is the first number on the 1st line. To exit the field test, turn off phone.
LG LX-350, LX-550 Fusic (Sprint)
Enter ##33284#. Select Service Screen from Debug menu. Signal is after Rx power. Press CLR to exit or power off.
Note: The Fusic has a special service code that you must get from Sprint.
LG PM-225, PM-325, MM-535, LX5400
Press ##33284# or ##33284 then press the blue OK button. If asked for a password, it is usually 040793 or 000000. Choose DEBUG SCREEN. Signal strength is after RxPower. Press Clear or power off to get out.
