This comes less than a year after Securus's main competitor, Global Tel-Link, acquired another provider of prison video chats, Renovo.
Now critics fear that the wider rollout of video calling could eliminate in-person prison visitation and cause skyrocketing costs for prisoners and their families.
With today's update for i OS, however, Viber allows i OS users to call any landline or mobile number from within the app. Calls to Mexico are almost 500 percent more expensive on Skype than on Viber and calls to the US are more than 100 percent more expensive on Skype than on Viber.
Viber Out lets Viber users from all over the world call EVERYONE (even if they are not Viber users).
But they push the latter option because it translates directly into revenue, according to advocates and officials at correctional facilities.