Flashing custom firmware carries the risk of "bricking" the device (making it unusable) and will void any existing warranties. It is highly recommended to back up your original firmware before attempting a flash. IPTV приставка ZTE ZXV10 B760HS2 - Хламада

Install the burning tool software and the necessary drivers on your Windows PC.

is often recommended for Mediatek-based ZTE boxes, though specific customized flashers from community developers are frequently used.

None of these offer the complete freedom of a custom firmware, but they carry lower risk.