SIMBA’s roaming partner in Vietnam, Mobifone, has recently introduced VoLTE support, which enables you to make high-quality voice calls directly from your handset’s dial pad. This means that you will no longer need to rely on the SIMBA Voice App to make or receive calls when you choose to roam on Mobifone.
Here is a list of countries where you can use the VoLTE Roaming feature when you roam on the corresponding networks.
Denmark (Nuuday TDC)
Finland (Elisa Finland)
India (Reliance Jio)
Malaysia (Celcom, Digi)