Turn an Old Android Phone Into a Universal Remote
An old Android phone can be repurposed as a universal remote using Wi‑Fi/Bluetooth apps (Roku, Samsung SmartThings, Google, and others) or via an infrared blaster that plugs into USB‑C, letting you control TVs, streaming devices, and other smart gear without internet; options range from free or inexpensive apps to small IR blaster dongles (~$15) and mini‑hubs that add voice control.