The Realme C21Y comes with the network
2G GSM 850 / 900 / 1800 / 1900 – SIM 1 & SIM 2,
3G HSDPA 850 / 900 / 2100,
4G 1, 3, 5, 8, 38, 40, 41
5G N/A band for its connectivity.
It has inbuilt with it Wi-Fi capability and the ability to create Wireless hotspot.

Realme C21Y SIM Type and Slots

The Realme C21Y comes with Single / Dual SIM slots. The SIM Type are Nano

Realme C21Y Display

The Realme C21Y comes with a display of 6.5 inches with a resolution of 720 x 1600 pixels.
It uses the IPS LCD, 400 nits (typ) Capacitive touchscreen display technology. The display is quite good quality for phones within this price range.

Realme C21Y Processor and GPU

The Realme C21Y processor speed is Octa-core (2xX.X GHz Cortex-A75 & 6×1.8 GHz Cortex-A55), the chipset is the Unisoc T610 (12 nm). The GPU is the Mali-G52.

Realme C21Y Internal and External Memory (RAM and ROM)

The Realme C21Y also comes with a 3 GB of RAM, an Internal Memory (ROM) of 32GB