Wg skvalex, twórcy call recorder jest tak:
"Does my Samsung device supports it? Samsung has disabled call recording function for most countries. But if you have device from one of the following countries, it should have call recording feature: Thailand (SPay), Vietnam (SPay), Israel, Algeria, Bangladesh, Libya, Egypt, Laos, Nepal, Sri Lanka and Tunis. If you'd like to change region, you need to change CSC code of your device. Search how to do it for your device."
Coś z tego spróbuję.