Phone is stuck on the regulatory screen
I got a phone from my sister. She had reset her phone and handed this one to me. I tried to transfer information from my old phone to this one but in the process of doing that, I was asked to update the phone to the latest IOS. I did that and was stuck at update requested for hours. I then changed my network source to a stronger connection. It downloaded and the took close to an hour to install the update.
I switched off completely thinking it’ll help but when I turned it back on to see how far it’s gone, it got stuck in the regulatory screen. I’ve tried to force restart, it didn’t work, let the battery drain out and charged it but it didn’t work. It doesn’t even give me the option to put a passcode. I don’t know what to do, is the phone bad now?
iPhone 15 Plus