Model Deco M4

Hardware version V2

Fiemware version 1.4.2

Yesterday I upgrade the firmware of my Deco M4 to 1.4.2. Big big mistake!!!! Before that everything works excelent. Now my slave deco at the second floor does not work as good as before. Now the signal is poor and my gadgets crash on Internet.

Could I reinstall the original version??? Please help.

I have 2 decos, 1 en the first floor (main) and the other in the 2nd floor.