What is VoLTE？

VoLTE  (Voice Over LTE) is the voice calls service transmitted via 4G network, you can enjoy more stable & high-speed voice call! CTM customers can enjoy FREE VoLTE Service by holding a handset that has activated the VoLTE function, to enjoy better call experience!

Advantages of VoLTE

1.      Stable connection, better voice quality

2.      Fast connection, shorten call waiting time

3.      Two-line operation, you can use data to online while making a call

How to use VoLTE？

1.          Need a mobile phone that supports VoLTE function

2.          Upgrade the phone system to the latest version

3.          Activate the phone's VoLTE function

VoLTE iOS Usage Guideline

1.      Click " Mobile " in " Settings "

2.      Click  " Primary "

3.      Click " Voice & Data "

4.      Activate " VoLTE "

VoLTE Android Usage Guideline

1.      Click " SIM cards & mobile networks " in " Settings "

2.      Click " CTM "

3.      Activate " Use VoLTE"

For more Android models’setting and activation procedure, please refer to detail information

Notes:

- Please update your mobile system to the latest version, and refer to activation method above.

- When 5G mobiles are in 5G mode and some 4G mobiles have already activated VoLTE by default, there is no need to manually activate VoLTE. For mobiles that have not been set for automatic activation, you can refer to the above settings and activation methods.

- The activation method here is for your reference. According to different models and software version, the actual screen and procedure may be slightly different.

Handsets support VoLTE：

Note:

-       The above mentioned devices are referred to those bought at CTM . For those that are not, please check with the relevant suppliers.