Follow along with the video below to see how to install our site as a web app on your home screen.
Nota: This feature currently requires accessing the site using the built-in Safari browser.
Si es un cambio completo tienes que darle a "firmware upgrade". El resto como has dicho.
No tocar hasta que termine el flasheo.
Hazte una copia de los imeis/nvram desde recovery o desde mobileuncletools 64bits.