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You need one for VoLTE (so any voice calls), 5G and Wifi calling. Without carrier phone whitelist, you won't be able to call on AT&T and many other networks.
by izacus 4y ago
You need one for VoLTE (so any voice calls), 5G and Wifi calling.
Without carrier phone whitelist, you won't be able to call on AT&T and many other networks.