WhatsApp Voice Call is now rolling out to iOS users. The company ceo claims the rollout will be gradual so it may take some time for some users to start using it.

The voice call is yet to be banned in Nigeria, so you can keep your airtime cost down by using the whatsapp voice call to make calls to your friends.

Read more here: http://news.bestprices.ng/make-free-calls-to-your-friends-on-your-iphone-with-whatsapp