Samsung launched the Galaxy M21 as one of its battery- and camera-centric phones for the Indian market. The OEM has just dropped its 4 and 6GB RAM SKUs by INR 1,000 (~US$14) each in price. This may hint at a stock-clear to make way for a newer device: could it be the M12?
https://www.notebookcheck.net/Samsung-India-discounts-the-Galaxy-M21-by-INR-1-000-across-the-board.521676.0.html