• iPhone 7 / 7 Plus

• iPhone 6S / 6S plus

• iPhone 5S

• iPhone SE

• iPhone 6 / 6 plus

• iPhone 5C

1. Update iOS to the latest version (9.3)

2. Update Carrier bundle to dtac 24.2

3. Go to Settings > Phone

• Select “Wi-Fi Calling”

• Select “Wi-Fi Calling on This iPhone”

• Select “Enable”

• Select “Accept” Term & Condition

4. Wi-Fi Calling on This iPhone turn to green color and

ready to use

1. Go to Settings > General 2. Select “About” 3. Support IOS version 9.3 onward 4. Carrier bundle version 24.2 onward

1. Go to Settings > General 2. Select “Software Update” 3. Follow Software Update instruction to latest IOS version

1. Go to Settings > General 2. Select “About” 3. If an update is available, a prompt will appear then click “Update”

1. Go to Settings > Phone 2. Select “Wi-Fi Calling” 3. Select “Wi-Fi Calling on This iPhone”

4. Select “Enable” 5. Select “Accept” 6. Wi-Fi Calling on This iPhone turn to green color

Symbol indicates for

WiFi calling service enables