Punctuation (or lack thereof) is making that difficult to read and understand. What I'm thinking you're reporting is you're having to re-authenticate an app (MTV). Not sure why a phone would be involved. Any browser on any device should suffice, so the phone-specific reference is confusing.
I think MTV is one of those apps that is used by cable subscribers, and I believe that's what you're indicating. If that's the case, try removing the app, then rebooting the Roku, then reinstalling the app. All those steps, in that order. Let us know what happens.
DBDukes
Roku Community Streaming Expert
Note: I am not a Roku employee.
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