|Language supported||English, Chinese, Malay, Vietnamese, Indonesian|
|Display type||IPS LCD, HDR10, 90Hz|
|Display Size||6.7 inches, 108.4 cm2 (~83.0% screen-to-body ratio)|
|Resolution||1080 x 2400 pixels, 20:9 ratio (~393 ppi density)|
|SIM||Dual SIM (Nano-SIM, dual stand-by)|
|Chipset||Qualcomm SM6350 Snapdragon 690 5G (8 nm)|
|Internal||128GB 8GB RAM|
|Back Camera||48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF|
|Back camera 2||8 MP, f/2.2, 118˚ (ultrawide)|
|Back camera 3||2 MP, f/2.4, (macro)|
|Back camera 4||5 MP, f/2.4, (depth)|
|Features||Dual-LED flash, HDR, panorama|
|Video||4K@30fps, 1080p@30fps, gyro-EIS|
|Selfie Camera||16 MP, (wide)|
|Sensors||Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass|
|Audio 3.5mm jack||Yes|
|WLAN||Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot|
|Bluetooth||5.1, A2DP, LE|
|Dimensions||167.1 x 78.1 x 9.4 mm (6.58 x 3.07 x 0.37 in)|
|Weight||205 g (7.23 oz)|
|Battery||Li-Po 5000 mAh, non-removable|
|Charging||Fast charging 18W, Quick Charge 4.0+|
|2G bands||GSM 850 / 900 / 1800 / 1900|
|3G bands||HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100|
|4G bands||1, 3, 5, 7, 8, 20, 28, 38, 39, 40, 41 LTE|
|5G bands||1, 3, 5, 7, 28, 41, 78 SA/NSA|
HTC Desire 21 Pro features a 6.7-inch Full HD+ (2400 x 1080 pixels) resolution display with a punch-hole cutout in the centre for the selfie camera. The screen supports 90Hz refresh rate and is HDR10 certified. It has a glossy finish on the back and measures 9.4 millimetres, weighing 205 grams.
The Desire 21 Pro is powered by the Qualcomm Snapdragon 690 5G processor with an octa-core CPU and Adreno 619 GPU. This is paired with 8GB RAM and 128GB storage along with support for a microSD card slot. It runs on Android 10 out-of-the-box.
The phone has a quad-camera setup on the back that consists of a primary 48MP camera, an 8MP ultra-wide-angle camera, 2MP macro camera and a 5MP depth sensor. The rear cameras can record in 4K UHD at 30FPS with support for EIS along with a 16MP selfie camera up front.
The power button on the right edge doubles up as the fingerprint reader and the phone is equipped with a 5,000mAh battery with support for 18W fast charging out-of-the-box.