Viber updated their BlackBerry client this week to v2.1.17 which is a small bump. This new update brings bug fixes along with overall performance updates. Sadly most users are waiting for full VoIP support to make calls but this update is still limited to text chatting only.
Check out Viber free in App World

Viber Team Not Registered
Posted: May 31, 2012 at 3:48 AM EST
Hello,
This is an official Viber representative.
Voice for BB is coming in the next few months. In the meantime enjoy our improved release and please let us know if you have any questions.
You are also welcome to follow our Facebook and Twitter pages for updates.
Thanks,
Viber team
Naveed Not Registered
Posted: September 15, 2012 at 1:51 AM EST from my BlackBerry 9700
Hi there why you not making free calls for Blackberry
Viber Not Registered
Posted: September 16, 2012 at 4:30 AM EST
Hi,
Our calling feature for Viber for BB is still under development, and we hope to release it soon.
For the latest news and updates, please visit our officail Facebook or Twitter pages
Naveed Not Registered
Posted: September 16, 2012 at 3:16 PM EST from my BlackBerry 9700
Please viber I want free call feature for bb 9700 . And can you tell me when is update coming out.
Viber Not Registered
Posted: September 20, 2012 at 7:04 AM EST
Unfortunately we still don’t have specific release dates, but we are working around the clock to complete it as soon as possible. We recommend that you stay tuned for the latest news and updates through our official Facebook page
Naveed Rahim Not Registered
Posted: November 12, 2012 at 6:39 AM EST
Hi there is viber voip call will be in Christmas on Blackberry
Viber Not Registered
Posted: November 12, 2012 at 5:42 PM EST
We’re not sure yet.
We promise to inform you once we have news
Naveed Not Registered
Posted: September 20, 2012 at 12:42 PM EST from my BlackBerry 9700
Hello there you are disspointed me you always make exuses there’s no voip yet I’m angry now not only me everyone who has Blackberry.
Naveed Not Registered
Posted: November 11, 2012 at 4:33 AM EST from my BlackBerry 9700
Hi there when are you bringing call feater because I can’t call my friends on Blackberry. Please bring it quickly waited for long but no voip yet
Viber Not Registered
Posted: November 11, 2012 at 10:19 AM EST
Hi,
Unfortunately we still don’t have precise release dates, but we’re doing our best to bring the calls update to our fans as soon as possible.
Once we have news, we’ll keep you posted through our official Facebook page or HelpDesk.
Naveed Rahim Not Registered
Posted: November 12, 2012 at 6:42 AM EST
Hi Again I can’t write post wall on your Facebook page how come
Viber Not Registered
Posted: November 12, 2012 at 5:42 PM EST
Viber’s Timeline is currently disabled.
You may reach us through any other platform you like: here on BerryReview, through our official HelpDesk, on Twitter, etc.
Naveed Rahim Not Registered
Posted: November 21, 2012 at 9:50 AM EST
Hi there im still waiting for voip call on viber for blackberry i cant wait anymore.
Viber Not Registered
Posted: November 23, 2012 at 12:16 PM EST
We are working around the clock to complete it as soon as we can. We apologize for the delay :/
Once we have news, we’ll let you know.
Tom ( View Profile) - Posts: 388
Posted: May 31, 2012 at 8:47 AM EST
Great update as far as device usability (i.e., Viber no longer cripples device with large Address Book)! Thanks!
Viber Not Registered
Posted: June 1, 2012 at 10:21 AM EST
@Tom -
We’re thrilled to hear that – thank you for your report!
You can expect much more to come…
Tom ( View Profile) - Posts: 388
Posted: June 1, 2012 at 10:45 AM EST from my BlackBerry 9930 | OS 7.1.0.402
Bring it on!
Ahmed Not Registered
Posted: July 25, 2012 at 7:43 PM EST from my BlackBerry 9300 | OS 6.0.0.650
Hi everyone
I need a site to download viber for my blackberry,but not app world cause I live in Iraq and we don’t have full BB services here.
I apprecaite if anyone can send a link, so I can keep conacting people worldwide.
Thank you and best regards
Viber Not Registered
Posted: July 26, 2012 at 11:24 AM EST
Hi,
You can try downloading the app from the direct link in our HelpDesk, at: http://bit.ly/KSxfu1
Naveed Not Registered
Posted: November 11, 2012 at 4:37 AM EST from my BlackBerry 9700
Can you tell me is it only Blackberry 10 will have voice for viber or All OS’s
Viber Not Registered
Posted: November 11, 2012 at 10:21 AM EST
Hi,
Our goal is to bring Viber’s voice feature to as many Blackberry devices and OS versions as possible, however we are not yet sure for which exactly it will be technologically possible.
We are working around the clock these days testing and developing, and we promise to keep our fans posted as soon as we have some concrete information regarding this issue.