Unless your box is completely unusable (no channels, constant crashing), a firmware update for these generic 1509 units usually creates more problems than it solves. You might lose remote control functionality, or the menu might change to Russian.
The golden rule: If it ain't broke, don't fix it . But if you are missing channels or experiencing glitches, the "1509 dvbt2 512m firmware update" is the most effective solution.
Yet people still repair, reflash, share via USB on street corners, and keep these zombies running. It’s a quiet, global, mostly invisible rebellion against e-waste and enforced obsolescence.