That moment when you discover that SMILE 4G now supports voice calls and your defected most adored smartphone doesn’t supports 4G network. To cut the long story short, SMILE 4G now supports voice call.
SmileVoice is the latest innovation from Smile Communications, making your voice experience as clear and reliable as your Smile 4G LTE internet, for our customers in Nigeria, Uganda and Tanzania.

With the Smile Voice application on your mobile you can make clear and reliable voice calls when connected to your Smile 4G LTE internet service to anyone, anywhere. You can also make voice calls, video calls and conference calls, and send SMS messages to your friends and family when you’re connected to any other data network.  
How Can I Activate SMILE Voice?
Insert your Smile sim into a compatible VoLTE smartphone and it will be auto set up or download Smile voice app for Android and iOS below;
For android download here
For iOS download here
Setting up SMILE Voice?
>>Install and open the application on your enabled smartphone
>>Open the App and enter your Smile number and Activation code. Also select the country where you have Smile broadband internet – your service will be active and you can make that first call.
Or
>> If you cannot remember your Smile number and Activation code, just select the country where you have Smile broadband internet and click on “GET AN ACTIVATION CODE” – you will be requested to provide your email address and your Smile Voice details will be sent to this email address.
>> Open the App and enter your Smile number and Activation code. Also select the country where you have Smile broadband internet – your service will be active and you can make that first call.
Note
Smile 4G is giving out 30 FREE SmileVoice minutes and 30 FREE SMSs to call or SMS anyone in Nigeria as a welcome promo. The free minutes and SMS are valid for 10 days only. 
Smile Voice Tarrif Plan
SmileVoice call rates are charged in MBs to your active data bundle.
Now that you know that you can use your SMILE sim for voice call, what will then happen to your Airtel, MTN or Etisalat line?