I was never able to get ARC to work on my Motorola Razr 3. I bought a new Motorola Edge + and after I transferred my data and apps to my new phone again ARC didn’t work BUT after I cleared the app’s cache it works. So maybe there is some phone specific compatibility issues? Or clearing the cache of the app is the magic fix. I"m going to try that on my wife’s Iphone because it’s never worked on her phone ever. She has an Iphone 10 or 11. We’ll see.