iPhone test mode - find out the real network signal level! How to find out the cellular signal strength in numbers on an iPhone using the hidden Field Test system application.
Typically, users to determine the level of received cellular signal A simple indicator of several strips located in the status bar is enough. But there is no need to talk about the information content of such a tool. If you want to know the real strength of the signal, then a hidden system will come to the rescue. iPhone app Field Test.
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Sometimes smartphone users are surprised: why does the signal strength indicator show two bars, but web pages do not load? Or why does one person have four bars, while his neighbor with a different phone only has two? People are accustomed to relying on the indicators of such a simple tool to determine the level of communication with the cellular network. In fact, all these stripes or bars make little sense.
Moreover, the number of stripes can be completely arbitrary. Usually, a larger number still means a stronger signal, but it is impossible to talk about the existence of any standard scale. As a result, each manufacturer decides for itself what signal level it associates with one bar. These rules may also vary from model to model.
If you want to know exactly how high-quality the connection is in this place, you need to know the specific signal strength measured in decibels (dB). You don't even have to install it on your iPhone. additional program. Information will be provided by a hidden system application Field Test. It may not be particularly convenient, but it is simple and effective.
How to Access the Field Test Menu
This menu has constantly evolved along with iOS. Our guide will definitely suit those running iOS 11 or iOS 12.
To begin, open "Control center" or go to "Settings" and turn off Wi-Fi there. Now go to the application "Telephone" and at the dial prompt, enter the following characters (including asterisks and hash marks):
Press the call button, after which the application menu will appear on the screen Field Test.
How to find out the cellular signal strength in numbers on iPhone using the hidden Field Test system application
In the application Field Test there are many points, and not all of them are intuitive. This is logical - the menu is not intended for ordinary users, and for service engineers.
Start by selecting an item LTE V "Main menu"(Main Menu). To measure the signal level in 3G networks, you also need to select the section LTE.
Then you need to go to the section Serving Cell Mass.
It will contain measurements of communication parameters with the network cell to which you are connected. currently connected. Going to this menu will bring up a data page. You may notice that the parameter values change every few seconds, updating. We need the line rsrp0. It's about O Reference Signal Received Power, the power of received pilot signals from the nearest tower.
But the smartphone may also be connected to a secondary, additional station. Then the signal strength will be displayed in the section rsrp1.
The value of this parameter must be negative, in the range from -40 to -140. The closer it is to the upper limit (-40), the stronger signal reception. A value close to -140 indicates weak signal. Values from -40 to -80 indicate reliable reception and no connection problems. A reading below -120 should raise alarm. The user may experience connection interruptions and low data transfer speeds.
We enjoy listening to music, looking for information on the Internet, communicating on in social networks, we spend hour after hour playing exciting games. And all this with the help of a convenient pocket device called a smartphone.
“Smart phones” are increasingly becoming part of our lives. We can no longer imagine what we would do without the help of these compact devices. But how many of their capabilities do we use? It turns out that there is very little.
And today we want to introduce you special codes, which, if used skillfully, will be useful even to an inexperienced user. And although the functions are intended mainly for the iPhone, some of them will also work for Android smartphones.
1. How to find out IMEI? Combination: *#06#
IMEI - unique number, which is assigned to each phone, be it new model smartphone on Android or an old push-button Nokia with a monochrome screen.
WITH using IMEI you can check the date of manufacture of the device, the date of its repair, the date of purchase and other parameters. You can also use this number to find your phone number if it is stolen from you.
2. Information about data forwarding. Combination: *#21#
Do you want to know if your calls or SMS are being sent to other subscribers? With the above combination you will know everything in a matter of seconds.
3. Find out the number to which the forwarding is assigned. Combination: *#62#
This function allows you to see the number to which messages, calls, etc. are forwarded. If you are being controlled, you will see who is doing it.
4. Disable forwarding. Combination: ##002#
Using a simple combination, you can disable the option to forward your data to another number. One combination - and only you receive all calls and SMS intended for you.
5. Call waiting information. Combination: *#43#
The call waiting feature is useful for busy and business people who spend a lot of conversations on the phone. While waiting for an important call, you can enable the above-mentioned function and the specified subscriber will call you, regardless of whether you are on the phone or not.
6. Activate call waiting. Combination: *43#
Activate the call waiting function for a specific subscriber and he will be able to easily call you.
7. Disable the call waiting feature. Combination: #43#
If the right person If you have already called and need to disable the function, it is not difficult to do so.
8. Communication parameters. Combination: *3001#12345#*
A complex combination that provides full information about the SIM card. Here you can see the communication level parameters in numbers. This helps to find out at what point the connection is best. Quite useful before starting something important telephone conversation in an area where the signal is poor.
9. Number service center. Combination: *#5005*7672#
Hello! Those who caught the appearance mobile phones They probably remember that the number of functions they had was not very large and many had fun with the so-called test mode (well, or the engineering menu - everyone called it differently). It allowed a lot - increase the volume, check the work various functions, find out the network signal level, etc. Honestly, I didn’t think that the iPhone had a similar test mode... but it does! True, you can do not so much in it, but still a few interesting features There is. Today I will tell you about this in a little more detail, let's go!
Important note! In fact, the engineering menu is intended (as the name suggests) exclusively for engineers, testers and service center workers. All operations are carried out at your own risk. Remember this!
Well, let’s start with those who are not scared by this! :)
Why do you need test mode on iPhone?
iPhone has a special engineering menu in which you can see all technical information about signal strength cellular network, communication towers and much more. On the one hand, in most cases there is not much benefit from this. The iPhone already has a general signal indicator cellular communications, located in the left top corner- five points that approximately reflect the reception quality in this moment.
And if you take a different look, then seeing the real and actual strength of the cellular network signal in exact numbers, instead of the usual 5-point scale, is at least interesting, and in some cases even necessary.
Why even know this? Two options come to my mind:
- Just for fun, try that such a function exists and forget.
- Choose the telecom operator that provides maximum coverage in the place where you are most often.
After all, a good signal is not only the confidence that you can always be reached by phone, but also more long work battery on one charge. After all bad reception- one of .
How to enable the engineering menu on iPhone?
In order to activate test mode, you need to do the following:
- Go to Settings - Wi-Fi and turn it off.
- It is important to remember that the strength of signal reception depends on whether you currently have LTE enabled or not. To get an accurate result (for example, when comparing operators), conduct testing in one mode - 3G or LTE. Let me remind you that switching between them occurs in Settings - Cellular - Data settings.
- Enter the following combination on the keyboard (just like a regular number) - *3001#12345#* and press the call button.
- The test mode will start and now instead of “network indication points” you will see the exact signal numbers.
To close engineering menu And iPhone transition To normal state, just press the Home button.
It is important to know that when performing this manipulation on an iPhone with iOS 9.0 and older, when turned on, there will initially be no numbers in the upper left corner, only the inscription “Back to: Phone”. In order to see exactly the signal level, you need to perform certain actions. More on this below...
If you want your iPhone to always show the numerical signal level, instead of the usual dots, or just see them on a device with iOS 9.0 and older, you need to do this:
- Start test mode.
- Hold down the power button until the slider with the word “Turn off” appears, release the button - the slider should remain on the screen.
- Press and hold the Home button until you are taken to the desktop.
That's it, now the iPhone will constantly show the network signal level in numbers. Even after a reboot.
In order to return everything as it was, you will need to turn on the test mode again and exit it by pressing the “Home” button.
What do the numbers at the signal indication mean?
Well, what they mean is, in principle, clear - they show the strength of the cellular network signal reception as accurately as possible. But which numbers are “good” and which are “bad”?
In short: the smaller and closer to zero, the better. If we consider in comparison with the “normal” indication (five points), then a value less than -80 is full and confident reception(all five points are black), and lower than -110, on the contrary, there is only one division out of five.
Every secret code for iPhone is combination of numbers and symbols* (asterisk) and # (pound sign). They are entered using standard panel To dial a number: simply open the Phone app and press the required characters on the keyboard.
Depending on the type of combination the user will need to press the call button or not press it (some codes work instantly after dialing). This depends on whether the combination matches the media parameter or specific model smartphone.
Now let's take a quick look basic secret codes for iPhone:
- IMEI number
- Call barring
- Call forwarding
- Anonymity
- Center number SMS messages
IMEI is an international mobile equipment identifier, a 15-digit code that uniquely identifies your iPhone in GSM networks, UTMS, etc. It is always printed on the original box of the purchased device and may be required in cases where the device IMEI is needed and when filling out a complaint to the police or when contacting an insurance company. This ID number can also be found in your phone settings.
* 3001 # 12345 # * + “Call”
By accessing the hidden iPhone test, you can find out the real updated information about your mobile network. The menu that appears will show the numerical value of the signal and you can read data about the nearest communication towers.
If you click on the level digital signal in the upper left corner of the screen, will appear ability to switch between graphic and digital displays. Numeric values always negative. Numbers around "-50" indicate optimal reception, while "-120" are considered very weak.
Status: *#33#
Enable: *33*pin#
Turn off: #33 * pin #
These secret codes for iPhones will help you check restriction status of all your outgoing calls, user data and text messages. This prohibition is used to protect against accidental calls, for example, when a child may be playing on the phone. Modern iOS allows you to perform the same shutdown directly from your phone's settings or by turning on Airplane Mode. But anyone can disable these settings.
It is important to know
Replace "pin" with your SIM card PIN, not the iPhone code!
Status: *#43#
Enable: *43#
Disable: #43#
This parameter allows receive other calls while the current conversation is in progress, or vice versa, prohibits parallel calls. Second and others callers will be placed in a waiting queue. iPhone owner receives the corresponding sound notification, and can decide whether to start a new conversation or simply connect the person waiting on the line to the current conversation.
All in a row: *#21#
When not available: *#62#
When busy: *#67#
Disable all forwarding: ## 002 # + “Call”.
If the subscriber is busy or on vacation, he can forward your calls to another colleague or family member. Use the mentioned secret code and interrogate the iPhone about its current call forwarding settings.
Will be useful
Besides speech recordings, the option allows you to check the forwarding of data and faxes.
Status: *#31#
Current call: #31 #phone number + "Call"
When initiated outgoing call the owner of an iPhone It is possible to make your phone number available to the receiving subscriber or hide it. Anonymity status can be checked using the first code above.
To initiate anonymous call, the user can edit the list of their contacts directly in phone book, adding the secret code for iPhone #31# in front of the number of a specific subscriber, and then saving it in this form.
*#30#+ "Call"
Displays the number of incoming calls that have arrived on the phone.
*#5005*7672#+ “Call”
Allows you to get the current operator's text message center number.