Why is the internet disconnected during a call

Why does the Internet disconnect on the phone during a call? Is it supposed to be like this, or does it indicate a problem with the mobile device?

While talking on the phone, users notice that the mobile Internet automatically switches from 4G to 2G or disappears altogether. Should I be worried about this problem and how to solve it? We will talk about this in our article.

Why is the internet disconnected during a call?

4G mobile connection (LTE) is a technology that provides only access to mobile Internet. She cannot participate in the process of making calls. Therefore, during a call, the 4G mobile Internet switches to 2G or 3G. You can only change this if you connect the service of cellular operators called VoLTE.

The VoLTE (Voice over LTE) feature allows you to make voice calls using 4G, which means that:

  • The subscriber can simultaneously make a call and use high-speed mobile Internet.
  • The quality of voice transmission is improved.
  • The subscriber can quickly get through to his interlocutor.

To activate the VoLTE service, you need to make sure that both your smartphone and mobile operator support it.

Why does the Internet turn off when I make a call on a phone with two SIM cards?

If two SIM cards are installed in the mobile device, usually one is used for calls, and the second provides access to the mobile Internet. If this is not the case, and the Internet still disappears during a call, the user needs to follow these steps:

  1. Go to wireless settings.
  2. Select the “Mobile data” or “SIM card and network” section.
  3. Select the desired SIM card, which should provide Internet access during a call.
  4. Make sure “Preferred Network Type” is set to “4G/3G/2G (Auto)”.

In addition, in the same section of mobile data, you need to move the slider to the active position opposite the line “Internet access during a call” or “Data transfer during a call” (if they are present). It will only be available if the phone has two SIM cards installed.

It is important to know that if one radio module is installed in the mobile device ( DSDS mode ), and not two, then even with two SIM cards, the Internet will disappear during a call. If the smartphone has two communication modules installed (DSDA mode), one SIM card can be used for telephone conversations, while the second one maintains a stable Internet connection even during a call.

If the Internet disappears on the phone during a conversation, then you should not worry. This is a normal phenomenon that can only be corrected by connecting to VoLTE service or purchasing a dual SIM phone with two independent radio modules.

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