How to increase call time on an Android phone

The situation when a conversation is suddenly interrupted exactly after a certain period of time is familiar to many smartphone owners. Most often, the limit of 2, 4 or even 10 hours is set not by the device itself, but by the SIM card or tariff plan of the telecom operator. However, in some cases, software failures of the operating system Android or specific settings of the device itself can artificially limit the duration of the connection.

In this article we will look in detail where to look for call time limit settings, how to use the engineering menu for diagnostics and what hidden USSD codes will help you remove the blocking. You will learn how to distinguish a hardware problem from provider limitations and what to do if a call drops on its own for no apparent reason.

Increasing call time often requires a comprehensive approach: from a simple balance check to resetting network settings. Let's go through all the setup steps one by one so that your conversations last as long as necessary.

Checking restrictions on the part of the telecom operator

The most common reason for premature call termination is the limit set by the mobile operator. Many tariff plans, especially corporate or prepaid options, have a strict limit on the duration of one communication session. This is done to balance the load on the network and prevent subscribers from accidentally going into deep minus.

To understand whether such a restriction applies in your case, you need to refer to the terms of your tariff. Users often confuse the time limit for one call with the total package of minutes. If you run out of package minutes, the call may be interrupted, but the system usually warns you about this with a voice message. In the case of a strict time limit (for example, 4 hours), the conversation ends abruptly and without warning.

To check and remove restrictions, you can use special USSD requests that are sent directly to the operator’s server. These commands work on any phone, regardless of the model Samsung, Xiaomi or Pixel. Here are the main codes that are worth trying:

• 📞 *#43# — checking the status of the “Call Waiting” service, which sometimes conflicts with long conversations.
• ⏱️ *#61# — checking the forwarding settings; if the call does not go through, it can be redirected to voicemail, creating the illusion of a break.
• 🚫 ##002# — a universal command for canceling all types forwarding, which often solves the problem of false interruptions.
• 🔋 *#62# —checking forwarding when the subscriber is unavailable.

⚠️ Attention: Some USSD codes may be paid or differ depending on your region and the specific operator (MTS, Beeline, Megafon, Tele2). Before entering complex commands, it is recommended to check their relevance in your personal account or the support service of your provider.

If the codes do not help, the only solution is to call the support service. The operator can manually remove the call duration limit if it was set incorrectly or is part of an outdated tariff. In modern conditions, most operators allow you to manage these parameters through a mobile application.

Call restriction settings in the Android menu

In the operating system itself Android there is also a function that allows the user to independently set a call time limit. This option is often used by parents to control their children's expenses or by company employees to limit personal calls from corporate SIM cards. By default, it's usually disabled or set to No Restriction, but a firmware glitch can accidentally activate it.

To check and change these settings, you'll need to go into the Phone app you're using to make calls. The interface may differ slightly depending on the manufacturer's shell (MIUI, One UI, ColorOS), but the logic of actions remains the same. You need to find the section responsible for additional communication parameters.

Follow this algorithm of actions:

1. Open the application Phone (green tube).
2. Click on the three dots in the upper right corner or button More.
3. Select item Settings.
4. Go to section Accounts for calls or Additional settings.
5. Find the item Call restriction (Call Barring).

In the call restriction menu you will see a list of options such as “All outgoing”, “International” and others. We are interested in item All outgoing calls. If it has a check mark or “Enabled” next to it, click on it. The system will ask for a password. By default, many smartphones use a code 0000 or 1234, but if you changed it, you need to enter your own version.

After entering the correct password, make sure that the switch opposite the time limit is in the “Off” or “No limit” position. If the system reports an incorrect password and standard combinations are not suitable, it is possible that the blocking is set at the SIM card level, and then only contacting the operator will help.

Using the engineering menu for diagnostics

For more in-depth configuration of the radio module parameters and checking the quality of communication, you can use the Android engineering menu. This is a hidden section of the system, intended for developers, but also accessible to ordinary users through special codes. Here you can check the signal level, battery condition and network parameters, which indirectly affect the stability of a long conversation.

Entering the engineering menu is done by dialing a number. Enter the code ##4636##in the phone dialing field. On most devices, the menu will open automatically immediately after you enter the last asterisk. If the code did not work, it is possible that the manufacturer of your model Android has blocked this access (often found in new models Samsung or Huawei).

In the menu that opens, select the item Information about the phone (Phone Information). Scroll down the page to the “Set up your preferred network type” section. Here it is important to make sure that the mode is selected supporting voice calls on your network, for example LTE/WCDMA/GSM (auto connect). The wrong choice may result in the phone trying to maintain communication on an unstable frequency, which will cause a break during a long conversation.

⚠️ Attention: Be extremely careful when changing settings in the engineering menu. Do not press the "Run Ping Test" or "Switch Radio" buttons unless necessary, as this may temporarily disable communication or reset the IMEI settings.

Also in this menu you can see network usage statistics. If you notice that the number of connection errors increases in proportion to the call time, this may indicate an overheating of the modem or a software glitch in the communication drivers. In this case, simply restarting the device often helps clear accumulated errors.

What to do if the code does not work?

If the code ##4636## does not open the menu, try downloading the Activity Launcher application from Google Play. Search for “Testing” applications and launch the “Phone Info” activity. This is an alternative way to enter the engineering menu on locked firmware.

The impact of power saving mode on communication stability

Modern smartphones are equipped with aggressive energy saving algorithms, which can negatively affect the duration of calls. When the battery charge drops below a certain level (usually 15-20%), the system begins to limit the operation of background processes and reduce the power of the radio module to save energy. This may cause the phone to simply "drop" the call to save charge for emergencies.

In addition, some "Super Power Saving" modes disable certain frequencies or switch the phone to 2G/3G mode, where voice quality is worse and the likelihood of dropouts is higher. If you often talk on the phone for a long time, it is recommended to disable hard saving modes or add the “Phone” application to the list of exceptions.

To configure exceptions, follow these steps:

1. Go to Settings smartphone.
2. Go to section Battery or Device maintenance.
3. Find item Energy saving or Battery optimization.
4. In the list of applications, find Phone and set the status "Do not limit" or "No optimization".

It is also worth checking the screen settings. If you set the screen to automatically turn off after 15-30 seconds, the phone may perceive prolonged talk time without touching as inactivity and try to fall asleep. Increase the screen timeout to 1-2 minutes for comfortable long conversations.

Comparison of causes of connection failure and solution methods

To quickly diagnose the problem, it is useful to systematize the possible causes. Below is a table that will help you compare symptoms with the most likely sources of problems and methods for eliminating them.

Problem symptom	Probable cause	Solution method	Complexity
The call is cut off after exactly 2 hours	Operator limit	Call for support or tariff change	Low
The drop occurs chaotically	Bad signal or overheating	Changing location, checking the engineering menu	Medium
Unable to make a long call	Restriction enabled in settings	Disable Call Barring in the phone menu	Low
Sound disappears, but the connection hangs	Codec or VoLTE network failure	Disable VoLTE in settings SIM cards	Medium
Phone turns off during a call	Battery wear	Battery replacement or calibration	High

As can be seen from the table, most problems are solved using software methods. However, if the problem is due to physical wear and tear on the battery (last line), software settings will not help. An old battery can produce sufficient voltage at rest, but under load (while the radio module is operating), the voltage drops and the phone turns off abnormally.

A critically important factor is the version of the Baseband: if after updating Android the problem suddenly appears, the modem may need to be reflashed, since new drivers may not work correctly with old equipment.

Resetting network settings as a radical solution

If none of the previous methods helped eliminate the problem with call duration, the system may have accumulated critical errors in the configuration of network protocols. In this case, an effective solution would be to reset the network settings. This procedure will return all Wi-Fi, Bluetooth, and cellular settings to factory defaults, removing any possible configuration conflicts.

It is important to understand that this operation will not delete your personal files, photos, or apps. However, you will have to re-enter passwords for saved Wi-Fi networks and re-pair Bluetooth headsets. Before starting the procedure, make sure that you remember the necessary passwords.

The reset process is as follows:

1. Open Settings devices.
2. Go to section System or General settings.
3. Select item Reset settings (Reset Options).
4. Click on Reset Wi-Fi, mobile data and Bluetooth settings.
5. Confirm the action by entering the screen unlock PIN code.

After the reboot, the phone will start searching for networks again. In the first minutes after switching on, you may experience increased battery consumption, as the modem is actively registering with the network. Give the device 10-15 minutes to stabilize, then try to make a long test call.

⚠️ Attention: Before resetting the network settings, make sure that you have access to the Internet via a mobile network or know the Wi-Fi password, since after the reset the automatic connection may not work.

Alternative method reset

On some Xiaomi and Samsung models, a network reset can be performed through a hidden menu. Enter the code ##72786## (code may vary) to start automatic network reset (SCRTN). Use with caution.

Frequently asked questions (FAQ)

Can a virus on a phone limit call time?

Theoretically, malware can interfere with the operation of system applications, including Phone. However, in practice, viruses are more often aimed at stealing data or displaying advertisements, rather than blocking calls. If you suspect a virus, scan your phone with an antivirus and remove recently installed questionable applications.

Why does the call only drop when using a Bluetooth headset?

This may be due to an unstable Bluetooth connection or low battery power in the headset. Also, some phones have a “Mute when removed” setting, which may work erroneously if the headset signal is lost. Try to forget the device in the Bluetooth settings and pair it again.

Does the phone's full memory affect the duration of the call?

The memory does not have a direct effect on the radio module. However, if the memory is full to capacity, the system may become unstable, slow down, and force processes to close, including the call process. Free up at least 1-2 GB of free space for the system cache to work correctly.

What is VoLTE and can it cause interruptions?

VoLTE (Voice over LTE) allows you to transmit voice over a 4G network. In areas of poor 4G coverage, the phone may constantly switch between 3G and 4G in an attempt to hold the call, resulting in dropouts. Try temporarily disabling VoLTE in the SIM card settings to check the stability of the connection.

How to increase call time on a dual-SIM phone?

Settings are applied individually for each SIM card. You need to go to the call settings, select a specific SIM card (SIM 1 or SIM 2) and check the restrictions for each of them separately, since different operators may have different limits.