: With the TV off, insert the USB into a white USB 2.0 port . Press and hold the Power/Standby button on the remote while plugging the TV back in until "Software Updating" appears.
: Go to Settings > Support > System Update > Upgrade from USB . Download Hisense UHD Smart 70M7000UWG part01 rar
: Do not turn off your TV or remove the USB drive during the installation, as this can permanently "brick" the device. Hisense Firmware Downloads & Updates | Support : With the TV off, insert the USB into a white USB 2