Yes, you can now make calls using Whatsapp. Whatsapp is currently testing a new voice-calling feature similar to the ones in other messaging apps such as BBM. Some users have downloaded a version of Whatsapp which can perform the voice calling action. To activate this feature, download this Whatsapp version from HERE and then follow the following steps.
Step 2 – Now install the apk file for “Enabling Whatsapp Calling Feature” within extracted file.
Step 3 – Run the Apk file downloaded and installed in step 2 and give Whatapp super-user permission.
Step 4 – Finish – The Calling Feature is Enabled.