How can I update my iPhone without using WiFi
how can I update my iPhone without using WiFi
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You can connect your iPhone to a Mac (thought finder) or PC (through iTunes) to update your device.
PC https://support.apple.com/guide/itunes/update-device-software-itns3235/windows
Mac https://support.apple.com/en-gw/guide/mac-help/mchl0e5e3d56/mac
Or, you can spend some quality time at a coffee shop, library, school, or other place with accessible WiFi