Don't want Airplane mode setting changed from on to off after IOS update
I have extended travel out of US. I leave iPhone 13Pro on Airplane mode with Wi-Fi turned on entire trip. Never an issue except when there is IOS update. Upon reboot, phone comes on with Airplane mode off, and Voila! I have $10 AT&T International Day charge. How can I have the phone stay in Airplane mode when it reboots after IOS update? BTY saw 2020 thread similar to this but never a solution offered. I turn Airplane mode on from Settings and well as WiFi.
iPhone 13 Pro, iOS 16