The Reliance JioFi Mi-Fi device comes with a free Jio 4G SIM. The device has a Good battery. In the box, you have a charger and USB cable. Apart from using as a Wi-Fi hotspot, the JioFi also offers to make HD voice and video calls with the help of JioJoin app in Wi-Fi connected smartphones. Sep 20, 2020 · Given that creating a custom image specific to a single target is costly the target needs to be worth it. If you are worth it as the victim of a targeted attack you probably know best. Other factors which might hinder the installation of custom firmware can be the use of signed firmware by the original vendor. If this is done depends on the vendor.