This is a side-by-side smartphone specs comparison of the realme C75x and vivo Y21d.
The realme C75x has a 6.67-inch display, MediaTek Helio G81 Ultra (12 nm) processor, dual cameras, 4G LTE connectivity, and 5600mAh battery.
Meanwhile, the vivo Y21d has a 6.68-inch display, UNISOC T7225 (12 nm) processor, dual cameras, 4G LTE connectivity, and 6500mAh battery.
| Specs | realme C75x | vivo Y21d | 
|---|---|---|
| Picture | 
				
					 
					
						
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| Screen | 6.67-inch HD+ IPS LCD Display (720 x 1604 Pixels, 264 ppi) with ArmorShell Glass, 20:9 Aspect Ratio, 120Hz Refresh Rate, 625nits max brightness, 500nits typ., and punch-hole | 6.68-inch HD+ IPS LCD Display (720 x 1608 Pixels, 264 ppi) with Guardian Glass, 90Hz Refresh Rate, 1000nits HBM, and punch-hole | 
| OS | Android 15 with realme UI 6.0 | Android 15 with Funtouch OS 15 | 
| Chipset | MediaTek Helio G81 Ultra (12 nm) | UNISOC T7225 (12 nm) | 
| CPU | Octa Core CPU 2x Cortex-A75 @ 2.0GHz & 6x Cortex-A55 @ 1.8GHz  | 
					Octa Core CPU 2x Cortex-A75 @ 1.8GHz & 6x Cortex-A55 @ 1.8GHz  | 
				
| GPU | Mali-G52 MC2 | Mali-G52 MP1 | 
| RAM | 8 GB | 4GB or 6GB of RAM | 
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| Rear Camera | Dual Cameras:  50MP Main Camera (f/1.8 Aperture, Autofocus) Adjunct secondary camera -LED Flash -Up to 1080p video recording  | 
				Dual Cameras:  50MP Main Camera (f/1.8 aperture, Autofocus) VGA auxiliary camera -Dual LED Flash -Up to 1080p@30fps video recording  | 
			
| Front Camera | 
						5 Megapixels (f/2.2 Aperture)  - Up to 1080p video recording  | 
					
						5 Megapixels (f/2.2 aperture)  - Up to 1080p@30fps video recording  | 
				
| Storage | 128GB | 128GB or 256GB (eMMC 5.1) | 
| Expansion | 1TB via microSD | 2TB via microSD | 
| SIM | Dual SIM (Nano-SIM) | Dual SIM (Nano-SIM) | 
| Networks | 4G LTE, 3G HSPA+, 2G EDGE & GPRS Networks | 4G LTE, 3G HSPA+, 2G EDGE & GPRS Networks | 
| Wi-Fi | Wi-Fi 802.11 b/g/n/ac (dual band) | Wi-Fi 802.11 b/g/n/ac (dual band) | 
| NFC | No | No | 
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.2 | 
| Infrared | No | |
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| Position | GPS, GLONASS, GALILEO, BeiDou, QZSS | GPS, GLONASS, GALILEO, BeiDou, QZSS | 
| USB OTG | Yes | Yes | 
| USB | USB Type-C | USB Type-C | 
| 3.5mm Audio Jack | No | No | 
| Audio Enhancement | Up to 400% speaker volume | Dual Speakers, Up to 400% volume | 
| FM Radio | No | Yes | 
| Sensors | 
					Face Recognition & Fingerprint Sensor					 Proximity Sensor & Ambient Light Sensor Accelerometer  | 
					
					Face Recognition & Fingerprint Sensor Proximity Sensor & Ambient Light Sensor Compass & Accelerometer Ring notification LED (Dynamic Light)  | 
				
| Battery | 5600 mAh  (Non-removable) 45W Fast Charging (100% in 90 minutes)  | 
						6500 mAh  (Non-removable) 44W Fast Charging (50% in 38 minutes)  | 
				
| Material | Glass front, Polycarbonate back (IP66/IP68/IP69 water & dust resistance, MIL-STD-810H shock resistance, 1.8-meter drop resistance) | Glass front, Plastic composite back (IP68/IP69 dust & water resistance, SGS 5-star Drop Resistance, MIL-STD-810H Shock Resistance) | 
| Size | 165.69 x 76.22 x 7.99 mm | 166.14 x 77.01 x 8.39 mm | 
| Weight | 196 g | 209 g | 
| Colors | Oceanic Blue, Coral Pink | Glowing Black, Coral Red, Lavender Purple | 
| Release Date | March 30, 2025 | September 28, 2025 | 
| Price | ₱7,999.00 - Official Price in the Philippines | ₱6,999.00 - Official price of 4GB+128GB version in the Philippines ₱8,999.00 - Official price of 6GB+256GB version in the Philippines  | 
						
| Buy Online | 
								realme C75x on Lazada  realme C75x on Shopee  | 
							
								vivo Y21d on Lazada  vivo Y21d on Shopee  |