Owners of the Xiaomi Redmi Note 3 smartphone often face non-standard tasks when setting up communication, especially when you need to enter a number. SIM-cards containing not only numbers, but also letters or special characters, such a need may arise when activating corporate tariffs, using specific USSD-commands or voicemail settings, where the data format requires an extended character set. The standard call keyboard by default offers only a digital row, which creates the illusion of being unable to perform the desired action without third-party applications.
But the Android-based MIUI operating system has hidden capabilities and engineering modes to get around this limitation. Unlike regular dialing, there are methods that open up access to the full ASCII character set. This is especially true for the Redmi Note 3, which, despite its age, remains popular for its reliability and customization. Understanding the principles of telephony in Android will help you effectively manage contacts and network settings.
In this article, we will look at how to enter alphanumeric numbers in detail. We will look at both standard methods through the contact menu and more advanced options through the engineering menu. Entering characters directly into the phone number field in a standard call is often blocked by the system, requiring the use of alternative ways to write data. Following the instructions will allow you to successfully save any format of the number in the memory of your device.
Standard methods of entering through the contact menu
The easiest and safest way to save a number that contains letters or characters is to use the built-in Contacts app. Unlike the dialing field, where the system only waits for numbers to make a call, the contact saving field allows you to use the full alphabet and special characters. You need to open the Contacts app and click the button to create a new record.
When you go to the number input field, the keyboard can automatically switch to the digital one. To return the letter row, look at the top of the keyboard screen or the change of layout icon (usually the "ABV" symbol or the globe), clicking on this element will return the standard keyboard, allowing you to enter any characters. Once saved, this contact will appear in the call list with the characters entered.
However, it is worth considering that when trying to make a call to such a number, the system may ignore letters if they are not part of a pause or wait. For numbers where the characters have a functional value (for example, a pause in p or a wait in w), it is better to use special codes, which we will discuss below, this ensures that automatic dialing works correctly.
⚠️ Warning: Keeping a number with letters in the Phone field can cause an automatic call to fail if the phone can't convert letters into tonal signals (DTMF). Use this method mainly for visual display or notes.
Use of special pause and waiting symbols
Often, the letters in a phone number are used to describe special control symbols, such as pause and wait, which are critical for automatically dialing additional numbers or voicemail access codes, and in Xiaomi smartphones, these symbols are hidden behind the asterisk or plus button on the digital keyboard.
To insert a pause symbol (denoted by a comma), which causes the phone to wait 2 seconds before dialing the next digit, you must press the * key several times or select the option "Add pause" in the drop-down menu. The wait symbol (denoted by a semicolon;) requires user confirmation before continuing the set and is also available through the optional character menu.
These symbols allow you to create complex chains of commands, for example, to access a corporate server, you may need to dial the main number, pause, enter a pin code and pause again, and using these signs correctly will save you from having to manually wait for the beeps and type again each time.
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For quick pause insertion when dialing, hold the asterisk button (*) or go to the add-on menu to select pause and wait symbols.
Engineering menu and hidden settings Xiaomi
To further adjust the network parameters and SIM-There is an engineering menu in the Xiaomi Redmi Note 3, accessed through a special code in the call. Enter the command ##4636## to enter the test mode. Here you can see detailed information about the phone, battery and use.
In the Phone Information section, you can see the current status. SIM-Maps and networks. Although direct entry of random number with letters is not explicitly provided here, this interface allows you to reset the network settings, which can help if the phone does not properly handle standard number formats. You can also force the type of network to be switched, which is sometimes required for specific operator services to operate.
There is also code ##6484## that opens the full engineering menu (CIT) used in manufacturing, which allows you to test the operation of the communication module, but changing the basic numbering parameters is not recommended without deep knowledge, as this can lead to signal loss.
The risks of the engineering menu
Setting up voice mail and forwarding
One of the most common reasons for entering characters is to configure voicemail. Operators often use the format of the number access, pin-code, #. On Xiaomi smartphones with a MIUI shell, voicemail settings are in the Phone application. Click on three dots in the corner or the menu button and select Settings.
In the settings menu, look for Voicemail or Voicemail Settings, and you can edit the number that you call the mail to, and that's where pause symbols can and should be used. Click on the number, and you'll see the option to add pause or wait, which will automate the entry to the drawer.
If your carrier requires you to enter letters (for example, to access certain services via the USSD), use the pause method. Enter the main number, pause, enter the code digits, and if you need confirmation (character #), add it through the character menu, which will create a sequence that the phone will perform automatically.
Table of special symbols and their functions
To understand the role of different characters in phone numbers, we have compiled a table with basic control codes, which are universal for the Android platform and work on Xiaomi devices in the same way.
| Symbol | Name of name | Function | Example of use |
|---|---|---|---|
| , | Pause (Pause) | Automatic delay of 2 seconds | Set of additional number |
| ; | Waiting (Wait) | Waiting for user confirmation | Entering a PIN code with verification |
| # | Grille | Completion of input or command | End of password entry |
| * | Star | Special symbol or command | Beginning. USSD-request |
Using these symbols makes a simple number a powerful automation tool, for example, you can save the login number of a conference call, where the access code will automatically be dialed after the beep, which saves time and eliminates errors when manually entering long sequences of numbers.
Addressing input and retention issues
If you encounter a phone that doesn’t save a number or gives you a format error, check if you’re using prohibited characters. The phone number field only allows numbers, characters +, *, #,, and;. Attempting to type letters (A, B, C) directly into some of the system settings fields can be blocked by the interface.
In such cases, it is recommended to use a third-party contact storage app that supports free text format, or to keep a number such as Note in contact. Also make sure that the correct number type (Mobile, Work, Home) is selected, as some types may have length or format restrictions.
For the Redmi Note 3 It is characterized by stable work with contacts, but using older versions of Android (Lollipop/Marshmallow) If the characters are not displayed correctly (krakozyabr), try changing the system language or encoding. SIM-Maps via engineering menu, although this is rare.
☑️ Checking the number settings
⚠️ Note: When entering long sequences with pauses, make sure that the total length of the number does not exceed the character limit set by the carrier or SIM-card 20-25 Exceeding the limit will result in the number being cut and no dial-up.
Alternative Methods and Macroses
If standard methods are not suitable for your task, for example, you need to enter a complex sequence to set up roaming or a special service, you can use macros. On Xiaomi, you can configure scripts through the Security app or third-party utilities that will automatically dial the desired number under certain conditions.
There are also caller apps from the Google Play Store that have advanced input functionality, which allow you to create text-commented number templates inside the dial box itself that are ignored when you call, but help the user navigate. However, for system functions (such as setting up redirects through codes), it is better to use a standard MIUI call.
In conclusion, typing a letter and character number on the Xiaomi Redmi Note 3 is a solvable task that requires understanding the difference between visual display and functional set. Using pause and expectation symbols, you can greatly simplify interaction with automated services.
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The main secret of successful entry of complex numbers is the use of pause symbols (,) and wait symbols (;) instead of letters, since the telephone network does not transmit letter characters, but converts them into tonal signals or ignores them.