Please include the specifications of the product when filling up your order. On the lower part portion of the product image, then click "add a note" to specify your preferred color, memory, and other specification.
(ex. Vivo V15, 128gb, 6gb RAM, Coral Red) (ex. BT HF PRO SY BT1607, Red) 
 
 SAMSUNG GALAXY A21S
 
Body: 163.7 x 75.3 x 8.9 mm, 192g; Plastic body and frame.
Display: 6.5" PLS TFT, 720 x 1600 px resolution, 20:9 aspect ratio, 270ppi.
Chipset: Exynos 850 (8nm): Octa-core Cortex-A55@2.0GHz; Mali-G52 MP1.
Memory: 3/4/6GB RAM; 32/64GB eMMC 5.1 storage; microSDXC (dedicated slot).
OS/Software: Android 10, One UI 2.1.
Rear camera: Wide (main): 48 MP, f/2.0, 26mm, 1/2.0", 0.8µm, PDAF; Ultrawide: 8 MP, f/2.2, 123°, 1/4.0", 1.12µm; Macro: 2 MP, f/2.4, fixed focus at 4cm; Depth: 2 MP, f/2.4; LED flash, panorama, Auto HDR.
Front camera: 13 MP, f/2.2.
Video capture: Rear camera: 1080p@30fps; Front camera: 1080p@30fps.
Battery: 5,000mAh; Fast charging 15W.
Misc: Fingerprint scanner (rear-mounted), accelerometer, gyro, proximity, compass; FM radio, RDS, recording, NFC, 3.5mm jack.