Advantages of this app include being able to block unwanted incoming and outgoing calls, as well as messages. Certain functions require root privileges; root access isn't necessary to block calls on Android 8+. There's also a feature to support Dual SIM smartphones. Blocking is performed at the system level, without missed first calls, screens aren't illuminated and dialers aren't in view. This app also offers private chat. It is possible to choose which incoming call will be replaced by another. It's also possible to block the "Reject" or "Not to answer" choice when making a call. For SMS messaging, it's possible to set a filter with a specific text definition. If no definition is set, all SMS messages from the specified number are blocked. The pipe symbol ";" can be used for multiple filters. When filtering numbers, you need to create a list and update it regularly. After that, "Not to block" mode is disabled; all blocking functions are disconnected. Instead, the black list is used for blocking every number added in this list. Each number can have different blocking parameters. The white list is used for blocking numbers that aren’t added in this list— it blocks all numbers using the settings of this list. Exceptions can be made to the blocking rules if you specify a template when adding a number to the list ("?" means any symbol, "*" means any quantity of any symbols). In order to block hidden numbers, it's necessary to leave a field empty. This can be accomplished through the use of regular expressions; these must start with "^" and end with "$." The full version of the program supports more accurate scheduling. Additionally, templates can be used in place of groups of contacts. Submode Point gives the user control over device hardware. To change submodes and have efficient programming, users must reboot their phones upon switching submodes. Additionally, blocking second sim is a must to ensure efficient programming. This is because rebooting the device after changing submodes does not erase the phone's networking. Smartphones with a MediaTek chipset require users to select submode 1. From the settings menu, access the "About" option to view information about the current state of the service. Additionally, green checkmarks in the SIM1 and SIM2 submenus indicate a successful operating system integration. The Tasker app may be added to the list of applications via "To start a new task." This action should be followed by selecting Root Call Manager and entering the list name in the data field. This should create a running list that is currently on display.

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The program allows to block undesirable incoming and outgoing calls and SMS.


Some program functions require root privileges. Root rights are not needed to block calls on Android 8+.
To use the program on Android 7.x with the latest versions of SuperSU, you need to put file radio.sh https://goo.gl/BhjW3J to folder /su/su.d, set permission to read and execute and restart the phone.
When using MagiskSU before Android 8, you need to put the file radio_magisksu.sh https://goo.gl/jsTSvQ to /magisk/.core/service.d(/sbin/.core/img/.core/service.d for Magisk 16.3+) folder, set permission to read and execute and restart the phone.



There is a support Dual SIM smartphones.
Blocking is carried out at system level, the program doesn't miss the first call, the screen isn't lit and there is no window of a dialer.
Features:
- Blocking incoming SMS and MMS on Android 4.4 above without appointment as its program for SMS processing.
- Blocking of outgoing calls and SMS.
- Support the Dual SIM smartphones with opportunity to set various parameters of blocking for everyone
SIM.
- Private conversation. Possibility of replacing the incoming call number.

For calls it is possible to choose a way of blocking "Reject" or "Not to answer". For SMS at desire it is possible to set the filter in the text (if the filter isn't set, all SMS from specified number are blocked). For division of several filters the symbol is used ";". If at the beginning of a field for the filter to put a symbol "!" all SMS not corresponding to the filter will be blocked.
For a filtration of numbers it is necessary to create the list and to make it current.
The "Not to block" mode - all functions of blocking are disconnected.
The black list - is made blocking of all numbers added in this list, for each number it is possible to establish the parameters of blocking.
The white list - is made blocking of all numbers which aren't entering this list, parameters of blocking undertake from list settings.
Exceptions numbers of this list are processed by the set rules irrespective of settings of the current list.
At number addition in the list it is possible to specify a template ("?" means any symbol, "*" means any quantity of any symbols). For blocking of hidden numbers for number it is necessary to leave a field empty. It is possible to use regular expressions (have to start with "^" and end with "$", only in the full version of the program).
There is an opportunity to use schedules - in set time the appointed list will be made the current.
Restrictions of the free version:
- No more than two entry in the list (it is possible to use templates, all from contacts, all not from contacts, numbers containing letters), aren't supported groups of contacts and an exceptions.
- There is no scheduler.
Important system settings:
- Wait after boot, sec.
This delay is necessary in order that by the time of program start the radio module managed to be activated completely the telephone module. Typical value – 10 … 40 sec., but many devices work and with a zero delay. If on your Dual Sim there is no blocking on the second this, it is necessary to increase this value.
- Submode.
Point serves for control for hardware features of the device. Selection of a submode at which the program is efficient can be demanded and the network on the device after start of the program (reboot) doesn't vanish. Reboot phone after change of a submode . For smartphones on MTK it is necessary to choose a submode 1.
In settings, point, "About" it is possible to look at current state of service, for successful work of the SIM1(SIM2 for Dual SIM ) has to be green.

Integration with Tasker: for use of Tasker it is necessary to add "To start the application" as a task, to choose Root Call Manager and to enter a list name into the data field. Thus there will be a chosen list will be made the current.

The Root Call SMS Manager MOD APK 1.22b1 application is free.
The Root Call SMS Manager provides a space to manage SMS messages.
With many useful conveniences, the versatile design makes it an ideal choice.
A mod that is unique to a specific game.

// Option A //

To download Root Call SMS Manager mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download Root Call SMS Manager mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download Root Call SMS Manager from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Root Call SMS Manager in HappyMod App.