I've been tasked with disabling the Startup Tone on my mom's beloved Nokia 2720. Seemed like a simple task: Just replace the startup tone with a blank tone. However, I'm finding successful connection to this device a little bit cumbersome. I've attempted connection via adb using the instructions over at BananaHackers: (
https://sites.google.com/view/bananahackers/customizations/startup-sound) and I even used their Universal Jailbreak to access the developer menu (
https://w2d.bananahackers.net/). I choose to enable both ADB and Developer Options on the phone's menu. My Windows 11 pc detects the phone, but ADB reports the device as connected but "unauthorized". The phone is a Nokia 2720 V Flip running KaiOS 2.5.4. I've read that KaiOS updates may disable rooting, but, does the simple replacement of the startup sound require rooting?