How to activate the Appels 4G service?

For iPhone:

Follow the steps below:

1. Go to Settings and tap Mobile data
2. In Options, tap Activate 4G and then Voice & data

The service is now active and you can enjoy all the benefits of 4G phone calls.

For Samsung:

WIFI Calling and 4G Calling require Android Oreo 8.0.
To activate the Appels 4G service, follow these steps:

1. Go to Settings
2. Tap Connections and then Mobile networks
3. Activate VoLTE calls SIM 1

The service is now active and you can enjoy all the benefits of 4G phone calls.