This is risky, and while the code has been tested and some checks are done at runtime, it may hard brick the modem. Running this tool will modify the bootloader sector of your device's flash memory. If your 5250 router is not working as it should, dropping connections or not being responsive, you should first do a reset of the router to see if the problems persist. Hard reset instructions for Sagemcom 5250. 1:47 Tutorial Desbloqueando modem Sagemcom 1704 Modem GVT. Que tinham dificuldade de configurar o modem Sagemcom PowerBox 2764 GV em modo bridge, Tutorial desbloqueio modem PACE v5471 Power Box GVT. Sagemcom F St 5302 GVT VIDEO and Games With.