Dial *3001#12345#* and press the Call button. This will launch the Field Test Mode app and where the bars/dots were in the top left corner of the screen, you’ll now see a negative number. The negative number is the decibel signal strength reading and should be followed by the carrier name and then the network type.
How is GSM signal strength measured?
For Android
Go to the Settings app > About phone > Status > SIM status > Signal Strength. You will see numbers expressed in dBm (decibel milliwatts).
What is a good cell signal strength?
Cell phone signal strength is measured in decibels (dBm). Signal strengths can range from approximately -30 dBm to -110 dBm. The closer that number is to 0, the stronger the cell signal. In general, anything better than -85 decibels is considered a usable signal.
Can I test my phone signal?
Tap SIM Status
Tap Settings. Tap About Phone. Tap Status. Your dBm is under Signal strength.
What does 3001 12345 do to your phone? – Related Questions
What is the use of * * 4636 * *?
*#*#4636#*#* Displays information about the phone, battery, and various network statistics.
What is the code *# 61?
Australia Country Code 61 Country Code AU.
What happens if I call ## 002?
##002# – If your voice call or data call, or SMS call has been forwarded, dialling this USSD code will erase them. *#21# – By dialling this USSD code, you would get to know if your calls have been diverted somewhere else or not.
What is the meaning of *# 0 *#?
Accessing the Secret Diagnostic Menu
To get the ball rolling, simply open your Samsung’s phone app. From there, enter *#0*# using the dial pad, and the phone will immediately go into its secret diagnostic mode. Note that the process is automatic, so there’s no need to tap on the green call button to enter the command.
What does * 97 do on a phone?
The next time you receive a call from a number you wish to block, end the call and dial *97. The number will automatically be added to your Selective Call Rejection list. You can block up to 30 numbers.
Does * 61 block your number?
Block calls from your phone
Receive an unwanted call? Press *61 to add the last call received to your call block list. Press *80 to turn call blocking off. Press *60 to turn call blocking back on.
What is * 60 on the phone?
Call Block, otherwise known as Call Screening, is a feature that allows you to block calls from up to 10 phone numbers within your local calling area for a low monthly rate. Turn on: Press *60.
What does * 63 do on a phone?
Caller Name Blocking
Block your name from appearing on caller ID while your number is displayed as usual. Outgoing calls will be displayed as Private, Anonymous or Unavailable. To activate, dial *63, then the number you wish to call. Your caller ID name will be blocked on the current call only.
What does *# 61 do on Android?
*#61#: This code shows you how long it takes until your phone calls are forwarded to the message center. #31#: A code that disables your caller ID. *31#: This code reinstates your caller ID. *43#: Use this code to activate call waiting.
What does * 77 do on your phone?
Reject anonymous calls
Anonymous Call Rejection (*77) stops calls from people that use a blocking feature to keep their name or number from being displayed. When Anonymous Call Rejection is turned on, callers will hear a message telling them to hang up, turn off the blocking feature, and call again.
What does * 82 do on a phone?
You can also use *82 to unblock your number in case your call gets rejected temporarily. Some providers and users will automatically block private numbers, so using this code will help you bypass this filter. Blocking your number can go a long way in stopping annoying robocalls.
What does * 78 do on your phone?
When you do not want to be disturbed by incoming calls, you can activate the “Do Not Disturb” feature. All calls will be directed to Voice Mail and you will not hear your phone ring. To activate Do Not Disturb, dial *78.
What does * 85 do on a phone?
North America & elsewhere
| Vertical service code |
Service definition |
| Tone dialing |
Pulse dialing |
| *83 |
1183 |
Selective call forwarding disable |
| *85 |
1185 |
Caller ID disable |
| *86 |
1186 |
Continuous redial cancel |
What happens if you dial *# 31?
Hide Caller ID: *31#
The caller might have hidden the ID intentionally or sometimes it can be accidental. If you want to hide the caller ID dial *31# and press call button.
What does dial *# 31 do?
Hide Your Phone From Caller ID: #31#
I could only get this to work on Android. But entering this code prompted a pop-up stating that my Caller ID had been disabled. In order to re-instate Caller ID, enter *31# .
What is * 73 on your phone?
If you’re on the phone or choose not to answer, the call will be forwarded to the destination phone number. You can still make outbound calls with this feature activated. To deactivate the No Answer/Busy Transfer feature, just dial *73.
