📴 3G services have been discontinued, and international roaming voice calls now require VoLTE (4G voice calling) support.

⚠️ If your phone does not support VoLTE or VoLTE is not enabled, you may experience issues such as:

• Unable to make calls
• Unable to receive calls
• Problems using voice calls while roaming overseas

Before traveling abroad, please confirm that your device supports VoLTE and that the feature is enabled to ensure normal voice call service while roaming.