Apple overtook Samsung in the fourth quarter as the largest smartphone producer in a declining global market for handsets, research firm IDC said Friday.
Apple has revealed a high-end smartphone with an "edge-to-edge" screen that has no physical home button.
The iPhone X - which is referred to as "ten" - uses a facial recognition system to recognise its owner rather than a fingerprint-based one.
Lee was convicted of bribery in a scandal that also saw the impeachment of South Korea's former president.
The case has gripped the public amid growing anger against South Korea's biggest companies, known as chaebols.