how to open VOLTE on iPhone 13 pro max
how to open VOLTE on iPhone 13 pro max? need to travel from China to US. Tele server told me to open VOLTE for international roaming.
iPhone 13 Pro Max, iOS 15
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2G, 3G, 4G, LTE, VoLTE, and 5G all are Carrier Specific features. Contact your Carrier (Cellular Service Provider), the agency that issued the SIM / eSIM to you.
However iPhone model specific feature is listed here --> Identify your iPhone model - Apple Support . and tap on "See the Technical Specs for Model XXXXXX" under each model and Scroll down to "Cellular and Wireless" section.