On this page we compare specs vivo U3x Octa-core (2x2.0 GHz Kryo 460, 6x1.8 GHz Kryo 460) with vivo Y91 Octa-core (2x1.95 GHz Cortex-A53 & 6x1.45 GHz Cortex A53), we compare external dimensions, compare screens and performance, the amount of RAM and memory for storing media data, battery capacity and characteristics of photo cameras, compare the presence of various sensors and functions.
| Hardware and OS | vivo U3x | vivo Y91 |
|---|
| Operating system | Android 11, OriginOS for iQOO 1.0 | Android 8.1 (Oreo); Funtouch 4.5 |
| Processor | Octa-core (2x2.0 GHz Kryo 460, 6x1.8 GHz Kryo 460) | Octa-core (2x1.95 GHz Cortex-A53 & 6x1.45 GHz Cortex A53) |
| Chipset | | Qualcomm SDM439 Snapdragon 439 (12 nm) |
| GPU | Adreno 619 | Adreno 505 |
| RAM | 4 GB, 6 GB, 8 GB | |
| Internal memory | | 32 GB, 3 GB RAM16 GB, 2 GB RAM |
| Internal Storage | 64 GB, 128 GB | |
| External memory | | microSD, up to 256 GB |
| Memory Card Slot | No | |
| User Interface | Yes | |
| Display | vivo U3x | vivo Y91 |
|---|
| Type | IPS LCD | IPS LCD |
| Size | 6.58 inches | 6.22" inc |
| Resolution | 1080 x 2408 pixels | 720 x 1520 px |
| Touchscreen | Yes | capacitive touchscreen |
| Screen-to-Body Ratio | | 82.9% |
| Display area | | 96.6 cm2 |
| Display aspect ratio | | 19:9 (height:width) |
| Pixel Density | 401 ppi | 270 PPI |
| Colors | 16M | 16M |
| Connectivity | vivo U3x | vivo Y91 |
|---|
| 5G Network | 1, 3, 28, 41, 77, 78 SA/NSA | |
| 2G Network | | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | | HSDPA 850 / 900 / 2100 |
| 4G Network | 1, 3, 4, 5, 8, 28, 34, 38, 39, 40, 41 | LTE band 1(2100), 3(1800), 5(850), 40(2300), 41(2500) |
| NFC | No | |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| Network | | GSM / HSPA / LTE |
| SIM card | | Dual SIM (Nano-SIM, dual stand-by) |
| SIM | Nano SIM | |
| Bluetooth | | 4.2, A2DP, LE |
| Dual SIM | Dual SIM (Nano-SIM, dual stand-by) | |
| Edge | | Yes |
| Wireless Charging | No | |
| GPRS | | Yes |
| GPS | Yes, with A-GPS, GLONASS, BDS, GALILEO | Yes, with A-GPS, GLONASS, BDS |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A, 5G | HSPA 42.2/5.76 Mbps, LTE Cat5 150/75 Mbps |
| USB | USB Type-C 2.0, USB On-The-Go | microUSB 2.0, USB On-The-Go |
| Camera | vivo U3x | vivo Y91 |
|---|
| Image | 2160p | |
| Main camera | 13 MP (wide), 2 MP (depth) | 13 MP, Dual |
| Specs | | 13 MP, f/2.2, PDAF
-2 MP, f/2.4, depth sensor |
| Features | LED flash, HDR, panorama | LED flash, panorama |
| Video | | 1080p@30fps |
| Selfie camera | 8 MP (wide) | 8 MP, Single |
| Multimedia | vivo U3x | vivo Y91 |
|---|
| Loudspeaker | Yes | |
| Handsfree | Yes | |
| Video Playback | Yes | |
| Video Out | Yes | |
| Ring Tones | Yes | |
| 3.5 mm Jack | Yes | Yes |
| Radio | No | FM radio |
| Design | vivo U3x | vivo Y91 |
|---|
| Waterproof | No | |
| Colors | | Starry Black, Ocean Blue, Red (Y91i only) |
| Dimensions | 164.2 x 75.4 x 8.4 mm | 155.1 x 75.1 x 8.3 mm |
| Weight | 185.5 g | 163.5 g |
| Battery | vivo U3x | vivo Y91 |
|---|
| Capacity | Li-Po 5000 mAh, Fast charging 18W | |
| Placement | Non-removable | |
| Battery capacity | | 4030 mAh, Non-removable Li-Po |
| Other | vivo U3x | vivo Y91 |
|---|
| Release date | | 2018, November |
| Sensors | Fingerprint (side-mounted), accelerometer, proximity, compass, | Fingerprint (rear-mounted), accelerometer, proximity, compass |
