Viber Application, Voice calling software, free broadband calls

One of the most common problems people have with Viber on iOS and Android are syncing problems. That is, getting your address book to show up as Viber users if they have an account and are currently utilizing the app for calling and messaging. Luckily, there are also quite a few things users can do to fix these types of issues without the need to uninstall and reinstall the app.

Of course, before you begin troubleshooting the issues, you should make sure you’re using the latest version of Viber.

One of the most likely reasons these issues occur is a failed or poor connection to the internet. Syncing contacts from an external data source such as a cloud storage source is also known to cause issues. Once you’ve downloaded the app and signed in, if you don’t see your Viber contacts immediately populate, check your internet connection. You might also try manually reconnecting your device to the data source, whether it be WiFi or a mobile network, closing and reopening Viber, or even doing a complete reboot of your device. Very often, doing these steps can fix the issue, regardless of the phone model you have.

It’s important to note that both you and your contact need to have the right phone number saved in your address books to be seen as a Viber user. A different phone number will not be seen in Viber until it’s manually added into your device’s address book.

With Viber for Android, you can push the Menu button and tap on Update Contacts. Select Home to allow the app to run in the background and within an hour, your Viber contacts should be updated correctly. For iPhone devices, you can open Viber once, close it completely and let it manually update over time.

If you’ve already performed those steps or don’t want to wait, you can try sending the contact in question an invite via Viber using the correct phone number or try deleting and re-adding the contact. You can also call your contact’s mobile number directly via the Viber app (not your device’s native dial pad). In all of these cases, be sure you have an active data connection and you’re including the country code in the phone number with the “+” included at the beginning. An example of a US phone number would be +1-000-000-0000 or a UK phone number 0141 000 000 (here’s a list of more country codes).

Following these troubleshooting steps should fix any sync issues you may have, but if you’re still not able to get your Viber contacts to sync with your device address book, let us know in the comments so the issues can be troubleshot further.

Avatar photo

By Josh Robert Nay

Josh Robert Nay is the founder and Editor-in-Chief of TruTower. He has worked in the telecommunications industry since 2003 and specializes in GSM based technology. He also uses (too many) VoIP apps and is a long-time user of BlackBerry, Android, and Windows Phone. He adores anything having to do with space exploration and writing. In addition to the links below, he can be found on LinkedIn and can also be found on his website at