Xiaomi Poco X4 Pro 5G vs. vivo Y55s (2021): A Detailed Comparison of Budget 5G Contenders
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🏆 Quick Verdict
For most users, the Xiaomi Poco X4 Pro 5G emerges as the stronger choice. Its 67W charging, capable of a full charge in just 41 minutes, significantly outperforms the vivo Y55s’ 18W charging. While both phones share an endurance rating of 119 hours, the Poco’s Snapdragon 695 offers a slight edge in efficiency, making it a better all-rounder.
| PHONES | ||
|---|---|---|
| Phone Names | vivo Y55s (2021) | Xiaomi Poco X4 Pro 5G |
| Network | ||
|---|---|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G bands | HSDPA 850 / 900 / 1700(AWS) / 2100 | HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 - Global |
| 4G bands | 1, 3, 4, 5, 8, 28, 34, 38, 39, 40, 41 | 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 38, 40, 41 - Global |
| 5G bands | 1, 5, 8, 28, 41, 77, 78 SA/NSA | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 77, 78 SA/NSA - Global |
| Speed | HSPA, LTE, 5G | HSPA, LTE, 5G |
| Technology | GSM / CDMA / HSPA / CDMA2000 / LTE / 5G | GSM / HSPA / LTE / 5G |
| CDMA2000 1x | 1, 3, 5, 8, 28, 40, 78 SA/NSA - India | |
| Launch | ||
|---|---|---|
| Announced | 2021, December 04 | 2022, February 28 |
| Status | Available. Released 2021, December 22 | Available. Released 2022, March 23 |
| Body | ||
|---|---|---|
| Build | Glass front, plastic frame, plastic back | Glass front (Gorilla Glass 5), glass back, plastic frame |
| Dimensions | 163.9 x 75.3 x 9.2 mm (6.45 x 2.96 x 0.36 in) | 164.2 x 76.1 x 8.1 mm (6.46 x 3.00 x 0.32 in) |
| SIM | Nano-SIM + Nano-SIM | Nano-SIM + Nano-SIM |
| Weight | 199.8 g (7.05 oz) | 205 g (7.23 oz) |
| - | IP53, dust and splash resistant | |
| Display | ||
|---|---|---|
| Protection | - | Corning Gorilla Glass 5 |
| Resolution | 1080 x 2408 pixels, 20:9 ratio (~401 ppi density) | 1080 x 2400 pixels, 20:9 ratio (~395 ppi density) |
| Size | 6.58 inches, 104.3 cm2 (~84.5% screen-to-body ratio) | 6.67 inches, 107.4 cm2 (~86.0% screen-to-body ratio) |
| Type | IPS LCD | Super AMOLED, 120Hz, 700 nits, 1200 nits (peak) |
| Platform | ||
|---|---|---|
| CPU | Octa-core (2x2.2 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55) | Octa-core (2x2.2 GHz Kryo 660 Gold & 6x1.7 GHz Kryo 660 Silver) |
| Chipset | Mediatek Dimensity 700 (7 nm) | Qualcomm SM6375 Snapdragon 695 5G (6 nm) |
| GPU | Mali-G57 MC2 | Adreno 619 |
| OS | Android 11, OriginOS | Android 11, MIUI 13 for POCO |
| Memory | ||
|---|---|---|
| Card slot | No | microSDXC (uses shared SIM slot) |
| Internal | 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM | 64GB 6GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 6GB RAM, 256GB 8GB RAM |
| UFS 2.1 | UFS 2.2 | |
| Main Camera | ||
|---|---|---|
| Dual | 50 MP, f/1.8, 26mm (wide), PDAF 2 MP (macro) | - |
| Features | LED flash, HDR, panorama | LED flash, HDR, panorama |
| Single | 8 MP, f/1.8, (wide) | 16 MP, f/2.5, (wide), 1/3.06" 1.0µm |
| Triple | - | 108 MP, f/1.9, 26mm (wide), 1/1.52", 0.7µm, PDAF - Global version 64 MP, f/1.8, 26mm (wide), 0.7µm, PDAF - India version 8 MP, f/2.2, 118˚ (ultrawide), 1/4.0", 1.12µm 2 MP (macro) |
| Video | 1080p@30fps | 1080p@30fps |
| Selfie camera | ||
|---|---|---|
| Features | - | HDR, panorama |
| Single | 8 MP, f/1.8, (wide) | 16 MP, f/2.5, (wide), 1/3.06" 1.0µm |
| Video | 1080p@30fps | 1080p@30fps |
| Sound | ||
|---|---|---|
| 3.5mm jack | Yes | Yes |
| 35mm jack | Yes | Yes |
| Loudspeaker | Yes | Yes, with stereo speakers |
| - | 24-bit/192kHz audio | |
| Comms | ||
|---|---|---|
| Bluetooth | 5.1, A2DP, LE, aptX HD | 5.1, A2DP, LE |
| Infrared port | - | Yes |
| NFC | No | Yes (market/region dependent) |
| Positioning | GPS, GLONASS, GALILEO, BDS, QZSS | GPS, GLONASS, BDS, GALILEO |
| Radio | - | FM radio |
| USB | USB Type-C, OTG | USB Type-C 2.0, OTG |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct |
| Features | ||
|---|---|---|
| Sensors | Fingerprint (side-mounted), accelerometer, proximity, compass | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass |
| Battery | ||
|---|---|---|
| Charging | 18W wired | 67W wired, PD3.0, QC3, 70% in 22 min, 100% in 41 min |
| Type | 6000 mAh | Li-Po 5000 mAh |
| Misc | ||
|---|---|---|
| Colors | Black, Blue, Pink | Laser Black, Laser Blue, Poco Yellow |
| Models | V2164A | 2201116PG |
| Price | About 210 EUR | € 160.40 / $ 419.99 / £ 255.00 / ₹ 12,940 |
| SAR | - | 1.06 W/kg (head) 1.09 W/kg (body) |
| SAR EU | - | 0.60 W/kg (head) 0.96 W/kg (body) |
| Tests | ||
|---|---|---|
| Battery life | - | Endurance rating 119h |
| Camera | - | Photo / Video |
| Display | - | Contrast ratio: Infinite (nominal) |
| Loudspeaker | - | -26.8 LUFS (Good) |
| Performance | - | AnTuTu: 335353 (v8), 384646 (v9) GeekBench: 2063 (v5.1) GFXBench: 17fps (ES 3.1 onscreen) |
vivo Y55s (2021)
- Significantly faster 67W charging
- Potentially better power efficiency with Snapdragon 695
- Support for PD3.0 and QC3 charging standards
- MIUI software can be polarizing
- Camera details are unknown, potential for inconsistent image quality
Xiaomi Poco X4 Pro 5G
- Proven Mediatek Dimensity 700 platform
- Simple and reliable user experience
- Good battery endurance (119h)
- Slow 18W charging
- Less efficient chipset compared to Snapdragon 695
Display Comparison
Both devices feature displays with an 'Infinite' (nominal) contrast ratio, suggesting standard IPS LCD panels. However, detailed specifications like peak brightness, color gamut coverage, and refresh rate are missing. Given the price point, expect both to offer adequate, but not exceptional, viewing experiences. The lack of information on PWM dimming rates makes it difficult to assess suitability for users sensitive to flicker. Bezels are likely comparable, typical of this segment.
Camera Comparison
Both phones are listed as having 'Photo / Video' capabilities, offering little insight. Without sensor size, aperture, or image processing details, a direct comparison is difficult. The prevalence of 2MP macro lenses in this segment suggests both phones likely include one, offering limited practical benefit. Image quality will heavily depend on software processing and the main sensor's quality, which remains unknown. The absence of OIS on either device suggests reliance on software stabilization.
Performance
The core difference lies in the chipsets. The Poco X4 Pro 5G utilizes the Qualcomm Snapdragon 695 5G (6nm), while the vivo Y55s (2021) employs the Mediatek Dimensity 700 (7nm). While both are octa-core CPUs with similar peak clock speeds (2.2 GHz for the Cortex-A76/Kryo 660 Gold cores), the Snapdragon 695’s 6nm process node generally translates to better power efficiency. The Poco also benefits from Qualcomm’s optimizations. The Dimensity 700 is a capable performer, but the Snapdragon 695 has a slight architectural advantage. RAM speed is not specified, but LPDDR4X is likely on both devices.
Battery Life
Both the Poco X4 Pro 5G and the vivo Y55s (2021) achieve an endurance rating of 119 hours, indicating similar overall battery life under standardized testing conditions. However, the charging experience is drastically different. The Poco X4 Pro 5G boasts 67W wired charging with support for PD3.0 and QC3, achieving 70% charge in 22 minutes and 100% in 41 minutes. The vivo Y55s (2021) is limited to 18W wired charging, resulting in a significantly slower charging time. This difference is a major advantage for the Poco, especially for users who frequently need to top up their battery.
Buying Guide
Buy the vivo Y55s (2021) if you prioritize a familiar Mediatek Dimensity 700 platform and a simple, reliable experience. Buy the Xiaomi Poco X4 Pro 5G if you value significantly faster charging speeds, potentially better power efficiency with the Snapdragon 695, and are comfortable with Xiaomi’s MIUI software.