Stuck in do-loop trying to add old Roku 4200X device to new network
You can only use the Roku app on a phone with a Roku that is ALREADY connected to your local network. Consequently, you cannot use the app on your phone to SET UP the Roku's net connection.
Roku TVs use a different command set than Roku streaming devices do. Consequently your Roku TV remote is of no use on your Roku device.
Your best and easiest bet is just to get a replacement physical remote. Once you've used it to establish the net connection on the Roku, you can use the phone app if you prefer.
Any of the remotes Roku sells will work with your Roku 3 (4200) (remotes sold by Roku here). The "Voice Remotes" control via wifi and must be paired with your Roku via the included instructions. The "Simple Remote" doesn't need pairing and controls via infrared, so the front of your Roku 3 needs to be placed where it is visible from the remote's location.
These also can be found at most Wal-Mart, Best Buy, etc. stores, and online at Amazon, eBay, etc. You can also find clone remotes from third party manufacturers, like this one on Amazon for under 7 bucks.
And finally, many inexpensive third party universal remotes can also control a Roku device like the Roku 3 via infrared -- just be sure it contains control codes for Roku devices.
