Make sure your phone and Roku TV are connected to the same Wi-Fi network
Turn on your Roku TV
On your phone, open the Roku app
Sign in to your Roku account if needed
In the Roku app, tap Devices
Select your Roku TV from the list
Follow any on-screen pairing prompts
To cast media, open a supported app on your phone
Tap the Cast icon or AirPlay icon if available
Select your Roku TV
To mirror your phone screen on Android, open Quick Settings
Tap Screen Cast, Smart View, or Cast
Select your Roku TV
To use AirPlay on iPhone, open Control Center
Tap Screen Mirroring
Select your Roku TV
Enter the code shown on the TV if prompted