• True 5G Postpaid subscribers (registered under individual customers), True give VOLTE provisioning automatically.
• True5G Prepaid subscribers (SIM is registered under individual customers), Customers need to request service activation or subscribe via USSD:
1. Dial USSD *440*1#  call
   for TrueMove H customers. Both monthly subscription and top-up methods individuals only
2. Dial USSD *440*2# call
   for TrueMove H customers. Top-up for legal entities (Hybrid Sim only)

When both the originating and receiving devices support VoLTE:

1. HD voice quality is significantly better than HD on 2G and 3G, up to 2 times better.
2. Supports high-definition (HD) video calls.
3. Faster call setup time, reduced from 5-7 seconds to just 0.5 seconds.

• Clear, high-definition (HD) voice quality for conversations.
• Faster call setup time, approximately 4 times quicker than before, depending on the phone's capabilities.
• Ability to use 4G data alongside 4G HD Voice without signal interference.
• Less battery consumption compared to making calls through various OTT applications (e.g., Line call)

1. Go to Settings > Mobile networks.
2. If you see the VoLTE Call option, it means your device supports dtac 4G Calling (VoLTE).
3. If you do not see the VoLTE Call option, it means your device does not support it yet, and you should update your software to the latest version. For dtac Phone devices, check that the Build number is from 'Blade_S6_Lite_VOL_B01' onwards. Once your device is updated to the latest software version, you can use dtac 4G Calling (VoLTE) immediately.

For Apple devices, update iOS to version 9.2 or later:

For iOS versions lower than 9.2:

1. Update iOS to version 9.2 or later.
2. Update the Carrier bundle to 'dtac 23.1' by going to Menu > Settings > General > About > Carrier bundle Update, and press Update.

1. iOS 9.2.X: You can enable/disable VoLTE by going to Settings > Enable 4G > Voice & Data.
2. iOS 9.3 and later: You can enable/disable VoLTE by going to Settings > Cellular > Cellular Data Options > Voice & Data.

For dual SIM devices, you need to select the desired SIM card to proceed with the operation.

Go to Settings > Mobile Networks > Turn VoLTE Call on/off according to your SIM card.

Go to Settings > Mobile Networks > Select your SIM card >Turn VoLTE Call on/off.

Go to Settings > Mobile & Internet > Select your SIM card > Turn VoLTE Call on/off.

Go to Settings > SIM cards & mobile networks > Select your SIM card > Turn VoLTE Call on/off.

Go to Settings > Mobile Networks > Select your SIM card > Turn VoLTE Call on/off.

Go to Settings > Connections > Mobile networks > Select VoLTE calls according to your SIM card.

Android 14 or higher & There is no VoLTE menu as the software defaults to turning it on, and it cannot be turned off.

Go to Settings > Connections > Mobile networks > Select VoLTE calls according to your SIM card.

• For iOS 9.2.X and below, you can turn VoLTE on/off by going to Settings > Enable 4G > Turn Voice & Data on/off.
• For iOS 9.3 and above, you can turn VoLTE on/off by going to Settings > Cellular > Cellular Data Options > Turn Voice & Data on/off.

For Apple iPhone 5G and above, there is no VoLTE menu as the software defaults to turning it on, and it cannot be turned off.

Go to Settings > Cellular > Cellular Data Options > Cellular Data Options > Turn Voice & Data on/off (4G/5G).

When you update your device to the latest software version, additional APN settings are not necessary.

Voice Call while moving:

• WiFi Calling (VoWiFi) > 4G Calling (VoLTE): Call remains uninterrupted.
• WiFi Calling (VoWiFi)> 3G: Call drops.
• 4G Calling (VoLTE) > 3G: Call remains uninterrupted.
• WiFi Calling (VoWiFi) > 4G Calling (VoLTE) > 3G: Call remains uninterrupted.

What are benefits of using VoLTE compared to 2G/3G (Voice Cellular)?

1. It can operate in HD voice, providing better sound quality compared to 2G and 3G.
2. Faster call setup time.

• Clear, high-definition (HD) voice quality for conversations.
• Faster call setup time, approximately 4 times quicker than before, depending on the capabilities of the phone used.

Customers should observe the mobile phone screen, which displays the VoLTE/VoWiFi icon. For iOS customers, the device will display either the 5G or 4G logo when making a Voice Call.

Customers can continue using Voice Calls uninterrupted.

In the case where customers use unlimited internet and are throttled after reaching the FUP limit, they can still use Voice Calls via LTE (VoLTE) normally, similar to when they are using the service before reaching the FUP limit.

Charge as current voice rate in your current tariff