5G Auto: Enables Smart Data mode. When 5G speeds don’t provide a noticeably better experience, your iPhone automatically switches to LTE, saving battery life . 5G On: Always uses 5G network when it’s available. This might reduce battery life.
Read moreDoes turning off 5G save battery?
On its website, the carrier says users can “toggle from 5G/LTE to 2G” to save battery life. T-Mobile’s battery-saving tip comes shortly after Verizon implied that turning off 5G helps prevent a phone’s battery from “draining faster than normal.”
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