Most DVB-T2 receivers are updated via USB. Follow these general steps based on manufacturer recommendations like those from iVcan and Panasonic Support :
Ensures full compatibility with MPEG-4 AVC (H.264) and HE-AAC audio standards for superior clarity. mpeg4 h264 dvbt2 software update top
Can add functionality like Multi-PLP support, expanded Electronic Program Guides (EPG), and improved PVR (recording) capabilities. Most DVB-T2 receivers are updated via USB
Updates often optimize the tuner's ability to handle interference and weak signals. How to Perform a Software Update expanded Electronic Program Guides (EPG)
Format a USB flash drive to FAT32 and copy the update file to the root directory.
The process typically takes 2–3 minutes. Do not power off the device during this time , as it can lead to permanent hardware failure. DVB-T2 Satellite TV Receiver User Manual