A:Answer Fiber is already very fast, during the pandemic everyone and his dog is on the net at once so slow service is part of what’s going on. Number of users streaming at same time will kill your speed as well. The fact the nets held up as well as it has has impressed me greatly. Your box is probably from fios, (Verizon) and I believe their modem/WiFi boxes are dual band as Comcast’s are as well. Unless your current unit only has 2.5 low band ,adding the 5.0 high band Will let more data packets through and could help but I doubt you will see much improvement at this time.