Three quick blind rounds with an obvious signal: 96 kbps MP3 vs lossless. The only question is whether any difference reaches your ears on this device.

Already passing the main test above 96 kbps with confidence?
Skip - you hear the difference, your chain works.

If you cannot hear a difference here, it is usually not your hearing. Low volume, room noise, or automatic sound enhancement in the phone, browser or headphone app often flatten the picture, and ABX on that setup will not mean much.