i tried many times to activate HBO Go on my Samsung TV but it didn't connect with it. please guide me.
Check this thread:
https://forums.verizon.com/t5/Fios-TV-Technical-Assistance/HBO-Go-on-my-Samsung-Smart-TV/td-p/783272
Also try uninstalling and reinstalling the app. Also go to the app settings, clear the cache then data in the app.