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To enjoy the high quality of voice call with our superb Network, please activate the VoLTE service in just a few steps! * 1-Card-Multi-Number service is currently not applicable in VoLTE service.
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1. Faster VoLTE voice call setup 
Customer can enjoy faster connectivity and better HD voice quality via VoLTE.
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2. Switch between voice and video call
Switch between voice and video call by pushing the button on the top right corner.
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Download SIM World App
Download the app through official channels only to reduce the risk of your mobile device being hacked.
