A common question when upgrading to high-definition calling is whether there is a "premium" price tag attached to the service.
The simple answer is no. There are absolutely no additional costs to use VoLTE on the OnSim network.
Why Is It Free?
VoLTE (Voice over LTE) is a core network technology, not a "bolt-on" or a luxury feature. We provide it as a standard part of our service to ensure you have the best possible call quality and connectivity.
Standard Minute Usage: VoLTE calls are treated exactly like traditional mobile calls. They come out of your monthly minute allowance (or are covered by your unlimited plan) just like a standard call.
No Data Charges: Even though VoLTE sends your voice over the 4G data network, it does not use your mobile data allowance. You won't see a "data drain" on your bill from making VoLTE calls.
Network-Wide Access: Whether you are on a basic plan or an enterprise-level Landline SIM, VoLTE is available to you at no extra charge.
What You Need to Get Started
Since the service is free, all you need to do is ensure your setup is ready:
A Supported Device: For a list of supported devices please click here.
Network Settings: Ensure the "VoLTE" or "4G Calling" toggle is switched ON in your phone's settings.
4G/5G Coverage: You simply need to be in an area with a 4G or 5G signal.