Viber offers free voice and video calls between people who use the app, plus calls with multiple Viber users. These calls run over the internet, so your mobile or internet provider may still charge for access. To call a landline or mobile number that does not use Viber, you need Viber Out, a separate paid service. (Viber Features, Rakuten Viber)
The choice depends on whom you need to reach and whether you want to change devices during a call. Voice, video, and group calls connect Viber users in the app. Viber Out reaches ordinary phone numbers, while call transfer can move an eligible active call to another device.
Which type of Viber call should you use?
A Viber-to-Viber call connects people who use the app. Viber Out is for calling a landline or mobile number, whether or not its owner uses Viber. (Viber Features, Rakuten Viber)
| Call type | Who you can reach | Cost | When it fits |
|---|---|---|---|
| Voice call | Another Viber user | No Viber calling fee; internet access may cost extra | You want to talk without video |
| Video call | Another Viber user | No Viber calling fee; internet access may cost extra | You want to see the person you are talking with |
| Group call | Multiple Viber users | App-to-app call; check your internet plan | Several people want to join the same conversation |
| Viber Out | A landline or mobile number | Paid service; check Viber Out terms | The person you want to reach is not using Viber |
| Call transfer | People already on a Viber call | Continues the existing call | You want to switch devices mid-call |
In short: call a Viber user in the app, use Viber Out for a regular phone number, and choose a group call when several Viber users need to talk together. If you want to move an active call to another device, check whether call transfer works with your setup.
How Viber free calls work
Voice calls
You can make a free voice call through Viber to another person who uses the app. Both callers need an internet connection. Viber describes this as a calling feature for its users, not as a call to a standard phone number. (Viber Features, Rakuten Viber)
“Free” refers to Viber’s app-to-app calling service, not to the internet connection. Mobile data may count against your carrier plan, and Wi-Fi access may also have terms or charges. Check with your provider if data costs matter to you.
Internet calling is often called Voice over Internet Protocol, or VoIP. The practical distinction is that a Viber-to-Viber call travels over an internet connection; Viber Out calls a phone number. (Voice over Internet Protocol, Wikipedia)
Video calls
Viber supports video calls between app users. Choose video when you want to see the person you are talking with, and remember that the call uses an internet connection. For setup information, see Viber video calls. Viber’s desktop voice and video calling guide covers desktop calls. Check Viber’s guidance for device and operating-system details, since support can differ by setup.
Group calls
A group call lets multiple Viber users join the same conversation. It can suit a family catch-up or a chat among friends, but it does not call several ordinary phone numbers through Viber Out. Viber lists group calls among its features, but the cited page does not give a participant limit. Check Viber’s in-app information or Help Center before planning around a specific group size. (Viber Features, Rakuten Viber)
For setup details, see Viber group calls. I’d check Viber’s own guidance for participant limits and device support rather than assume they are the same for every setup.
Calling phone numbers with Viber Out
Viber Out is a paid service for calling landlines and mobile numbers, including numbers whose owners do not use Viber. It is separate from free app-to-app calling. Viber describes the service as a way to call landlines and mobile phones, and its account page refers to Viber credit. (Viber Features, Rakuten Viber; Viber Out account page, Rakuten Viber)
Prices and terms can vary by destination and number. Check the details shown by Viber before buying or using credit. These guides provide further information on making international calls with Viber Out and Viber Out credits. Viber Out remains separate from calls between Viber users.
Moving an active call to another device
Viber describes call transfer as a way to continue a call on another device. Availability may depend on the devices and setup involved. Check Viber’s calling information and desktop call guidance for supported details. I would not assume every device pairing supports transfer or that the steps are identical across devices.
A quick way to pick your call type
- One person who uses Viber: make a voice call in the app.
- A Viber user you want to see: make a video call. See the video-call guide.
- Several Viber users: choose a group call and check Viber’s guidance for setup details.
- Someone with a regular phone number: check Viber Out terms for that destination.
- Already on a call but switching devices: check whether call transfer supports your setup.
Does Viber have free international calls? Yes, calls between Viber users use the app, though internet access may cost extra. An international landline or mobile number requires Viber Out, so check its terms before calling.
Can you call someone who does not have Viber? Yes, with Viber Out, a paid service separate from app-to-app calling. Do free Viber calls need internet? Yes. Your provider may charge for access or mobile data. Can you transfer a call between devices? Viber describes call transfer as a feature, but device and setup support may vary.
Start with the Viber app for calls to other users. For a regular phone number, review Viber Out terms before placing the call. Visit Viber for the service and the calling guides linked above.