Amazon.com: Samsung Galaxy A21S (64GB, 4GB) 6.5", Quad Camera, All Day Battery Dual SIM GSM Unlocked Global 4G LTE VoLTE (T-Mobile, AT&T, Metro, Straight Talk) International Model A217M/DS (64GB SD Bundle, White) :
Samsung Galaxy A21s | View Camera & Specs | Samsung UK
Samsung Galaxy A21s Dual SIM, 64GB, 4GB RAM, 4G LTE, UAE Version - Black
Amazon.com: Samsung A21s | SM-A217F/DS | 128GB 4GB RAM | International Model | Factory Unlocked (GSM Only | Not Compatible with Verizon/Sprint) (White) : Cell Phones & Accessories
Amazon.com: Samsung Galaxy A21S | SM-A217M/DS | 32GB 4GB RAM | Factory Unlocked (GSM ONLY | Not Compatible with Verizon/Sprint) International Model (Black)
Samsung Galaxy A21s 4GB Ram vs 6GB Ram - YouTube
Samsung Galaxy A21s A217M/DS, 64GB/4GB RAM Dual SIM 6.5'' HD Factory Unlocked - Blue
Samsung A21s 4Gb Ram 64Gb rom Price in Pakistan - YouTube
We can now be sure of a 4GB RAM Galaxy A21s variant existing - SamMobile