imageViber is a iPhone app that helps you to place your international calls for free over WiFi and 3G. (Viber works within the US too, but users don’t get charge by AT&T for iPhone-to-iPhone calls, therefore, there is no incentive here) .  The service only requires you and your overseas friends to register with your own iPhone number. And you can use Viber app instead of the built-in phone app on your iPhone to make all calls. The look and feels are the same including your standard contact list.

Normal call are routed to the normal iPhone phone app, but if you call your overseas registered friends, the call is routed over VoIP either over WiFi when available or 3G.  Watch the below video for more details.

Viber is available in Apple App Store.

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  1. Posted December 8, 2010 at 3:39 am | Permalink


    I would like to add to your great article that Viber also supports iPod-Touch and iPad (with the limitations of it not being a phone, of course).

    Also – we are currently working on an integration for Viber with Android and Blackberry. once this happens, it will allow users in the USA to call their friends for free not only inside AT&T. of course – international calls can be made even now by using Viber – absolutely free.

    We will be happy to assist any user who has questions/suggestions about Viber at our Forums:

    Have a great day,
    Viber Team.

  2. Posted December 8, 2010 at 5:02 am | Permalink

    You can try out Viber here even if you don’t have an iPhone:

  3. Posted December 10, 2010 at 12:00 pm | Permalink

    Free Unlimited Referral International Talk Time
    Unlimited Calling to India for Monthly Flat Fee & no per minute pricing!

  4. Posted December 13, 2010 at 12:37 am | Permalink

    i tried this , a very useful online call utility ………. other people also try this out……..

  5. Osvaldo
    Posted December 17, 2010 at 4:35 pm | Permalink

    I have a question about Viber.
    I have a friend in Buenos Aires, Argentina, who has an Iphone and has Viber.
    I am trying to connect to his Iphone but I can’t. i would like to know what exactly should i dial to get his Iphone cell number and connect to Viber.

    i have tried the following area codes:
    011-549-11 + his cell Iphone number.

    would you be so kind as to tell me what should I do to connect to his Iphone? or what should he dial to connect to my cell phone in Toronto, Canada.

    Thank you for your help.



  6. Posted December 17, 2010 at 5:29 pm | Permalink

    Once your friend is registered to Viber, you should see in the Viber address book the Viber logo next to your friend name. Click on the logo to place the call. You should not have to worry about dialing the number. If it doesn’t, you can always submit a support request here:

  7. Posted December 19, 2010 at 4:45 am | Permalink

    Hi Osvaldo,

    you should have no trouble dialing your friend’s number at all, even if he is in Atgentina. as long as you dial his full number (including area code), Viber call should get through. same goes for him, if he dials a full Canadian number.

    please tell me if you encounter problems again.

  8. selim bhuiyan
    Posted December 26, 2010 at 12:35 am | Permalink

    Viber call when can use android mobile? We are waiting for that.

  9. Posted December 26, 2010 at 1:22 pm | Permalink

    Hi Selim,

    Viber for Android should be available withing the next 2-3 months. We have a newsletter that sends out all the latest updates regarding Viber for Android. you can find it at

    if you have any other question – please feel free to ask.

    the Viber Team.

  10. RnB
    Posted January 9, 2011 at 9:44 pm | Permalink

    What about Japan. My gf and I have Viber and still no viber tag next to the number or person. We can’t connect cause it acts as if we both don’t have Viber. Very frustrating.

  11. Posted January 10, 2011 at 7:28 am | Permalink

    Hi RnB

    please check out this link:

    if it still doesn’t work, contact us through our support forums at, and they will help you solve the problem there.


  12. jojo
    Posted January 13, 2011 at 2:06 pm | Permalink

    should both of us (the caller and the receiver) have net wi-fi ow 3G? if we both have Viber and i have net but my friend not.. is it still work ?

  13. Posted January 14, 2011 at 1:50 am | Permalink

    If you are connected to the internet and you call a Viber friend who is NOT connected, the call naturally wouldn’t take place.

    Both parties need to have net (3G or WiFi) in order to make the call.

  14. Posted January 24, 2011 at 5:28 am | Permalink


    I’m excited to announce that Viber 1.1 has just been released.
    This new version focuses on the addition of small new features, and mainly – bug fixes.
    For release notes and the full fix list, I invite you to visit Viber’s AppStore page and download Viber 1.1

    In addition, I would like to draw your attention to our major updates in our Privacy Policy. We changed confusing clauses and made them much clearer, in accordance to users’ feedback.
    We would like to thank you for that feedback in the past 2 months, that allowed us to improve and better our service noticeably.

    If you have any questions, don’t hesistate to ask.

    Thank you,
    Viber Media.

  15. Jay
    Posted January 26, 2011 at 4:13 pm | Permalink


    i just found out abt this great app today.
    One question though – can ipod touch users use this app with me ( i have an iphone ) ?

    Thank you!

  16. Posted January 27, 2011 at 2:37 am | Permalink

    Yep, they sure can.
    iPhone, iPad and iPod-Touch users can all contact each other using Viber. Soon – also Android users will join the party πŸ™‚

    If you are confused as to how installing Viber on your iPod, feel free to ask.


  17. Lyn
    Posted April 18, 2011 at 1:07 am | Permalink


    Do I need to add country code when using viber and how? Im in Taiwan and I want to call my husband thru viber in japan

  18. Posted April 19, 2011 at 2:33 am | Permalink

    If your husband registered his Viber using his Japanese number, you can go to the Viber Keypad and manually dial the Japanese number in its full form, with a “+” in the beginning (a long press on “0” would generate the +).

    For example: +8140……

    If you encounter problems, let me know.

  19. Mi
    Posted April 19, 2011 at 4:16 am | Permalink

    my brother in Singapore is on Viber and I’m in HKG on Viber too. But we both cannot find the word “Viber” beside each other registered iphone number. Pls advise.

  20. Posted April 20, 2011 at 8:24 am | Permalink


    First, please make sure the number is written in its full format on both your iPhones. Also, try dialing the number manually through the Viber Keypad.

    If it still doesn’t work, enter Viber and find that person in the “All” contact list. Enter his details, change a digit, save and exit. Then enter his contact again, change the digit back (to the original, correct number), save and exit. Wait about 10 minutes and see if he’s recognized as a Viber user now.

  21. khris
    Posted June 20, 2011 at 9:44 am | Permalink

    I can’t receive any access code from Viber. I’m here in Japan and I downloaded the app and try to access it but it wouldn’t send me any access code. I tried to press the `no code?` button which directed me to another place where I can get a voicemail instead but still nothing.

  22. Posted June 20, 2011 at 11:12 am | Permalink

    hi @khris

    Please delete Viber, wait 24 hours and try again.
    If the problem remains, please specify what cellular provider you are subscribed to, and also check with other friends on the same network if they managed to receive the Viber code or not.


  23. Cannot hear or cannot receive text
    Posted September 16, 2011 at 12:01 am | Permalink


    My wife in Australia called me thru Viber, I see incoming call and picked but we cannot hear anything, it seems connected but no sounds from Australia or neither from my side in USA, please advise what went wrong with my Android? ?
    I appreciate

  24. Bei
    Posted March 26, 2012 at 7:07 pm | Permalink

    trying to add a friend from Japan. after i add her to contact, there is no viber sign beside her name. i add her name like +81 090 XXXXXXXX. is this the right way to add her? or I need to put 011 in front of 81

  25. Posted March 27, 2012 at 4:34 am | Permalink

    @Cannot hear or cannot receive text

    It sounds like one of the sides might be behind a firewall or a router, or a 3G network that’s blocking Viber’s ports.

    Are both of you connected to WiFi networks or 3G?

    Please make sure neither you nor the other side are connected to networks that might be blocking Viber (for example – a router running a firewall).

    1. First, please try uninstalling and reinstalling Viber when connected to different WiFi networks. Does it work now?
    2. Also, please make sure the following ports are enabled on your routers or firewalls:
    TCP: 5242 + 4244
    UDP: 5243 + 9785

    (if you are not sure how to enable ports, contact your router manufacturer)

    @Bei –

    The number should be added in its full international format. In Japan’s case, you should dial the country code (+81), the cellular code (EXCLUDING the “0” in the beginning), and then the rest of the number.

  26. kwon
    Posted September 10, 2012 at 2:46 am | Permalink

    i live in japan and i want to call a friend who lives in the US how do i enter his number?

  27. nilo
    Posted September 10, 2012 at 8:57 am | Permalink

    i live in italy how do i call in the philippines can i put code 0063 or +63

  28. Stephanie
    Posted September 10, 2012 at 1:25 pm | Permalink

    Will I need an international sim card for my iPhone to make calls to my family in the US while I’m in Japan?

  29. Posted September 11, 2012 at 2:04 pm | Permalink

    @kwon and @nilo –

    In order to call someone who is overseas through Viber, you need to dial/save the number in its full international format. Full instructions can be found in this page:

    Please let us know if all worked fine, and enjoy Viber πŸ™‚

    @Stephanie –
    Nope, you don’t need it.
    As long as both sides have Viber installed on their devices, Viber calls can be made all over the world, assuming both sides are connected to the internet.

  30. mae
    Posted September 26, 2012 at 6:32 am | Permalink

    installed my viber application here in the philippines. I just would like to ask if i will bring this out of the country, will this be working still?

  31. Posted September 27, 2012 at 5:31 am | Permalink

    @mae –

    Yep, Viber works between any 2 Viber users, as long as both of them are connected to the internet. No matter where they are in the world πŸ˜‰

  32. Broderick
    Posted October 9, 2012 at 10:01 pm | Permalink

    I live in Japan and my Brother is in the US. We both have Viber but we are not about to call each other and the Viber mark do not show up. I can talk to people here in Japan and he can talk to people in the US no problem but we can not talk to each other.

    Please help.

    Best Regards


  33. Monica
    Posted October 25, 2012 at 10:39 pm | Permalink

    I am trying to connect with my sister in Mexico who also has viber and we both have iphones but for some reason I cannot connect with her. it keeps saying that she does not have viber. but she clearly does.

  34. Posted October 26, 2012 at 9:27 am | Permalink

    @Monica and @Broderick –

    The source of this issue could greatly vary. Please read this short page in our HelpDesk, outlining some possible workarounds that will help reboot synchronization of the contact list:

    (The instructions refer to iPhone, but are relevant to all phones nevertheless).

  35. mae
    Posted November 18, 2012 at 6:48 am | Permalink

    i live in philippines and my friend is in the Australia. she already installed viber on her phone . How do i call her? do i need to add country code when calling her on viber and how?

  36. Posted November 19, 2012 at 3:36 pm | Permalink

    @mae –

    You need to dial/save her number in the international format. In Australia’s case: +61xxxxxxxx

    * note – you need to DROP the “0” of the cellular number’s prefix.

  37. Natasha
    Posted November 24, 2012 at 5:51 pm | Permalink

    I am from the usa and I have a friend in australia. I am trying to add them on viber for blackberry. He has viber for iphone but we still cannot connect? How do I go about doing this?

  38. Posted November 25, 2012 at 8:17 am | Permalink

    @Natasha –


    Which error message exactly do you see? Please elaborate on the problem.

    Note that Viber for Blackberry still does contain our calling service.

  39. Alemeh
    Posted December 11, 2012 at 2:52 am | Permalink

    Thank you for your very useful answers. I was connected with my friends in Japan and Iran. But I had problem with my friends In US. I noticed that I saved their number with 001 instead of +1.
    My problem solved.
    Thank you πŸ™‚

  40. Posted December 12, 2012 at 1:57 am | Permalink

    @Alemeh –

    We’re very glad to hear that all works fine now. Enjoy Viber, and if you have any more questions in the future, please don’t hesitate to contact me again πŸ™‚

  41. saeedeh
    Posted December 23, 2012 at 7:25 pm | Permalink

    I want to call some one with viber App in Iran so I want to make sure when I am calling to he/she my numbers display on his/her phone?


  42. Maxx
    Posted December 24, 2012 at 4:46 am | Permalink

    Hi, my husband is currently in Fiji and does not have a smart phone. I have been receiving calls from him thru viber even though he swears he hasn’t got a new phone with apps. Is it possible for him to be calling through viber if he does not have the app?
    Thank you πŸ™‚

  43. Posted December 24, 2012 at 10:35 am | Permalink

    @saeedeh –

    Your “Viber ID” is your real telephone number, so when you call someone through Viber they will see your number on their screen (or your name, if they have your number saved in their contact lists).

    @Maxx –
    If you are getting calls through Viber (and you are sure of it), then it must be calls from someone who has the app installed πŸ™‚

  44. Maxx
    Posted December 24, 2012 at 2:35 pm | Permalink

    Yes I’m definately sure, some of the calls come up “viber” and others are “regular call”. He says that he is still calling from his crappy $20 prepaid Nokia but this can not be possible??

  45. Posted December 25, 2012 at 2:16 pm | Permalink

    @Maxx –

    He might have registered to Viber using the NUMBER of that nokia on some other devices that DOES support Viber, but surely the Nokia device itself cannot (by any means) utilize Viber.

  46. kajal
    Posted February 4, 2013 at 2:29 am | Permalink

    how to add contacts on viber from fiji?

  47. Posted February 5, 2013 at 11:45 am | Permalink

    Hi to every one, the contents existing at this web page are genuinely awesome for people experience, well, keep up
    the good work fellows.

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