Hello. I am long-standing Samsung loyalist with 5 total HDTVs - this 75" UN75NU8000 is my largest and anchors my family room. After the quarantine spiked my wifi demands of me, my lady, and two teenagers, I decided to boost my Xfinity wifi from 300MB to 1GB. This involved a change in my wifi modem from my Netgear Nighthawk AC1900 / C7100V to Xfinity's XB7-T. Ever since this occurred days ago, my 75" Samsung WILL NOT STAY CONNECTED!!! It is driving us all crazy!!!