Using an iPhone 12 in Dual SIM mode throttles the cellular data speed to 4G LTE, according to an Apple Sales FAQ shared with retailers and carriers. All 5G iPhone 12 models support Dual SIM mode, ...
One of the major selling points of Apple's new iPhone 12 models is support for 5G connectivity, which is offered on its entire lineup (iPhone 12 mini, iPhone 12, iPhone 12 Pro, and iPhone 12 Pro Max).
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