The Samsung Galaxy M21 reportedly going to be launch in India soon, its an upgrade of last year launch Galaxy M20. The Galaxy M21 teaser poster reveals the launch date in India likely on 16th March at 12 noon. Also, the Samsung Galaxy M21 few specs details are unpacked, it seems to be a similar design & specs compared to Galaxy M30s. 
Therefore, the Galaxy M21 will sports with a 6.4-inch FHD+ display based on super AMOLED panel with Infinity-U notch design display to place the selfie camera. As per the promotional picture, the Galaxy M21 equipped to be a 20MP selfie camera and on the rear side, it comes with a triple camera module. Having a 48MP primary camera, 8MP Ultra-wide angle & 5MP portrait sensor. It will be powered Samsung Exynos 9611 octa-core processor combined with 4GB & 6GB RAM with 64GB internal storage. Also, it can be further expandable with the help of a dedicated SD card slot. 
It runs on top with Samsung One UI v2.0 based on Android 10 out of box. Finally, it powers with 6000mAH battery chargeable through USB type-C port with 15W fast charging support. In terms of connectivity, it supports 3.5mm audio jack, USB Type-C, Microphone, Bluetooth, WiFi and dual Nano SIM with dual VoLTE.