Data call forwarding
I called the *#21# and all the other numbers similar to it, they all came up saying the same thing. What does this mean? Are my calls being tampered with? Is my phone being tampered with?
iPhone 13 Pro Max
See -> Everything You Can Do With Your iPhone’s Secret “Interrogation Codes”
https://www.howtogeek.com/305583/everything-you-can-do-with-your-iphones-secret-interrogation-codes/
Additional -> charge the battery:
Low Power Mode is On.
Charge the iPhone & wait until the battery is fully charged (100%).
The Low Power Mode will turned off automatically.