wifi range change?

why is the range of my wifi now that i upgraded to the x-fi alot shorter than my technicolor modem?  the only thing that was changed is the new modem and my range has decreased about 50'.  my roku tv is also disconnected every time i turn it on, and i have to go into network settings every single time and reconnect.  this never happened with the technicolor.  its a pretty terrible business model to decrease people's wifi network range so we are forced to pay for the junk pods to get wifi back into rooms that dont have the modem in, even when they had no issues with previous modems.