On iPhone 12 and later models with an active 5G plan, you can download major iOS updates natively by enabling a specific data mode.
Some carriers may still impose their own limits, even if Apple's software allows the download. How to Enable iOS Downloads Over Cellular download ios with cellular data
If your device supports it, you must explicitly tell iOS to allow more data usage over your mobile network. Open the app on your iPhone. Navigate to Cellular (or Mobile Service in some regions). Tap on Cellular Data Options . Select Data Mode . On iPhone 12 and later models with an
Updating your iPhone's operating system traditionally required a Wi-Fi connection, but Apple has gradually relaxed these restrictions. Depending on your iPhone model and data plan, you can now download iOS updates using cellular data directly through system settings. Requirements for Cellular Downloads Open the app on your iPhone