Wi-Fi Calling on Samsung: How to Make Free Calls to Mobiles Without a SIM Card or with a Poor Signal

Calls via Wi-Fi on smartphones Samsung — This is a convenient feature that allows you to communicate even without a mobile network. It's especially useful in areas with poor coverage (basements, remote areas) or when you're abroad without roaming. But how do you set this up correctly to ensure free calls and stable connection quality?

In this article we will look at all the ways to make calls through Wi-Fi on Samsung Galaxy — from the standard function Wi-Fi Calling to third-party messengers. You'll learn which models support the technology, how to avoid connection fees, and what to do if calls aren't working. We'll also compare the pros and cons of each method to help you choose the best option.

What is Wi-Fi calling and how does it work on Samsung?

Technology Wi-Fi Calling (or VoWiFi) allows you to make voice calls and send SMS messages over the Internet, rather than through a cellular network. Your smartphone connects to Wi-Fi-network, and the operator routes the call via IP protocol. The main advantage is Calls are charged as usual (or free with unlimited minutes), but work even when the mobile signal level is zero.

On Samsung This feature is integrated at the firmware level and is supported by most models starting from Galaxy S6 (2015) and Note 5However, there are some nuances:

• 📶 The operator must support VoWiFi - in Russia it is MTS, Beeline, Megaphone And Tele2 (but not all tariffs).
• 🌍 Geographic restrictions — Some operators allow VoWiFi only in the home region.
• 🔄 Automatic switching — the smartphone automatically chooses whether to call via Wi-Fi or a cellular network, depending on the signal quality.

Important: Wi-Fi Calling ≠ Calls via MessengersThe first is a standard telephone connection (the number is displayed to the subscriber as a regular one), the second is Internet calls via WhatsApp, Viber etc., where the subscriber must have the same messenger installed.

Which Samsung models support Wi-Fi Calling?

Function Wi-Fi Calling available on most flagships and mid-range models SamsungReleased after 2015. Here are the main series with support:

To find out for sure whether yours supports Samsung Wi-Fi Calling, follow these steps:

1. Open the app Telephone.
2. Click on the three dots (⋮) in the upper right corner → Settings.
3. Check the availability of the item Calls via Wi-Fi or Wi-Fi Calling.

⚠️ Attention: On some models (especially for the US or European markets), this feature may be hidden. In this case, changing the firmware region or installing custom software may help, but this is risky and voids the warranty.

Step-by-step setup of Wi-Fi Calling on Samsung

If your smartphone and operator support Wi-Fi Calling, setup will take no more than 2-3 minutes. Follow the instructions:

Detailed instructions:

1. Connect to a Wi-Fi network (preferably with a good speed - from 5 Mbps).
2. Go to Settings → Connections → Wi-Fi Calling (on some models the path may differ: Settings → Mobile network → Advanced).
3. Activate the switch Calls via Wi-Fi.
4. Accept the operator's terms and conditions (SMS confirmation may be required).
5. Wait for the icon to appear Wi-Fi Calling in the status bar (next to the network indicator).

After activation:

• 📞 Calls will automatically switch to Wi-Fi when the cellular signal is weak.
• 🔄 You can select your preferred mode in the settings: Wi-Fi is preferred or Mobile network is preferred.
• 📶 If Wi-Fi is disconnected, the call will switch to the cellular network (if available).

⚠️ Attention: Some operators (eg. Megaphone) require inclusion VoLTE (calls via 4G) before activation Wi-Fi CallingCheck this in your mobile network settings.

How to Make Calls over Wi-Fi Without a SIM Card (Alternative Methods)

If your Samsung does not support Wi-Fi Calling or you want to call without a SIM card, there are several alternatives:

1. Calls via instant messengers (WhatsApp, Viber, Telegram)

The easiest way is to use messengers that support voice calls. Advantages:

• 💬 Free (only internet required).
• 🌐 Works in any country.
• 🔒 Encryption of conversations (in WhatsApp And Telegram).

Disadvantages: the subscriber must also use the same messenger.

2. Google Voice (for the US and some countries)

Service Google Voice Allows you to get a virtual number and make calls over Wi-Fi. It's suitable for international calls, but isn't officially available in Russia (a VPN is required).

3. VoIP applications (Zoiper, Linphone)

Professional VoIP calling solutions. You'll need:

1. Install an application (for example, Zoiper).
2. Register with a VoIP provider (e.g. Sipnet or Mango Telecom).
3. Set up an account in the application.

Pros: You can call regular numbers at low rates. Cons: More complicated to set up.

4. Skype with purchased minutes

Skype Allows you to call mobile and landline numbers at rates lower than those offered by carriers. Minutes are purchased in bundles (for example, 100 minutes for ~300 rubles).

Samsung Wi-Fi Calling Issues: Causes and Solutions

Sometimes Wi-Fi Calling It doesn't work even after being configured correctly. Let's look at common errors and how to fix them:

1. The Wi-Fi Calling icon does not appear

Possible reasons:

• 📵 The operator does not support VoWiFi. — check on the operator’s website.
• 🔄 Firmware update required - go to Settings → Software Update.
• 📡 Weak Wi-Fi signal — connect to another network.

2. Calls are dropped or the sound quality is poor

Solutions:

• 🔌 Reboot your router.
• 📶 Switch to range 5 GHz (if the router is dual-band).
• 🚫 Disable your VPN or proxy—they may block VoWiFi traffic.

3. Error "Failed to activate"

What to do:

1. Check if they are enabled Mobile data (even if you call via Wi-Fi, sometimes SMS confirmation is required).
2. Re-register with the operator's network: enter in the dialer ##4636##, select Phone information → Select network → Automatically.
3. Reset network settings: Settings → General Management → Reset → Reset Network Settings.

⚠️ Attention: If after all the manipulations Wi-Fi Calling If it doesn't work, contact your operator's support team—the problem may be on their end (for example, an inactive service in your personal account).

What if my operator doesn't support VoWiFi?

In this case, the only options left are instant messaging, VoIP, or Skype. You can also try changing your plan—some carriers only include VoWiFi on premium plans.

Wi-Fi Calling vs. Instant Messaging: Which Is Better?

Both methods allow you to make calls over the internet, but each has its pros and cons. Let's compare them based on key parameters:

Conclusion:

• 📞 If it’s important to you that your number is visible to the subscriber and the connection quality is stable, choose Wi-Fi Calling.
• 💬 If you need to make free calls without a SIM card or abroad, use instant messaging apps.

How to Save on Wi-Fi Calls: Life Hacks

Even if Wi-Fi Calling It is charged like a regular call, but there are ways to reduce costs:

• 📊 Connect unlimited minutes - Many operators offer tariffs with unlimited calls within Russia (for example, MTS "That's it!" or Beeline "Everything for 300").
• 🌐 Use Wi-Fi while roaming — If you're abroad, Wi-Fi calls will be cheaper than roaming.
• 🔄 Set up automatic switching — in the settings Wi-Fi Calling select Wi-Fi is preferredso that the smartphone always uses the Internet, and not the cellular network.
• 📵 Turn off mobile data when making calls — If you are sure that your Wi-Fi connection is stable, turn off your mobile internet to avoid accidentally switching to the cellular network.

For messengers:

• 📶 Use WhatsApp or Viber for international calls - they are free, even if the subscriber is in another country.
• 🔒 Turn on Saving traffic in the messenger settings if you have limited internet.

⚠️ Attention: Some carriers may block VoIP traffic (messaging calls) on corporate or public Wi-Fi networks. In this case, use mobile data or your home Wi-Fi.

FAQ: Frequently asked questions about Wi-Fi calling on Samsung

Is it possible to make Wi-Fi calls without a SIM card on a Samsung?

No, Wi-Fi Calling Requires an active SIM card with VoWiFi support from your carrier. For SIM-free calls, use instant messaging apps (WhatsApp, Viber) or VoIP applications (Zoiper).

Why does the subscriber see my number as "unknown" when calling via Wi-Fi?

This happens if your carrier doesn't transmit your number during a VoWiFi call. Solution:

1. Check your settings Wi-Fi Calling - sometimes there is an option "Show my number".
2. Please contact your operator - additional service activation may be required.

Is it possible to receive SMS via Wi-Fi on Samsung?

Yes, if your carrier supports it. Wi-Fi Calling, then SMS will also arrive via the internet. To do this, enable the option in the settings SMS via Wi-Fi (if there is one).

How much data does a call over Wi-Fi use?

On average:

• 📞 Wi-Fi Calling: ~1 MB/minute (like a regular IP call).
• 💬 Messengers: ~0.5–1.5 MB/minute (depending on the codec).

To save traffic, turn off video during a call (in instant messengers) and use a wired headset.

Does Wi-Fi Calling work on Samsung with dual SIM cards?

Yes, but only for your primary SIM card (the one used for mobile data by default). To change your SIM card for VoWiFi:

1. Go to Settings → Connections → SIM card management.
2. Select SIM for Calls via Wi-Fi.