If your phone doesn't have an IR blaster and the TV isn't "Smart," you have a few other options: IGO TV Remote Control Old Versions | Aptoide
If your old Igo TV runs Android 6.0 or higher and is connected to the same Wi-Fi network as your phone, you can use a generic network remote app. Igo Tv Old Models Remote App-
This is a small device (often disc or stick-shaped) that you place in front of your TV. It connects to your home Wi-Fi, and your phone connects to the hub via an app. If your phone doesn't have an IR blaster
All original remote functions are replicated, including: Igo Tv Old Models Remote App-