I love my vizio uhd tv with hdr. The following pro...

I love my vizio uhd tv with hdr. The following problems persist.
1. I cannot connect the tablet to my internet through Verizon modem. So tablet is useless to me.
2. Every now and then tv screen freezes. I have to turn off and on to unfreeze the screen. .
3. I don't know when hdr is in play.
Abdus saleem