Product
Vivo V15
Vivo V15
Apple iPhone 4s
Apple iPhone 4s
Battery
Stand-by - Up to 200 h (3G)
Talk time - Up to 8 h (3G)
Type 4000 mAh, non-removable Li-Po 1432 mAh, non-removable (5.3 Wh)
Body
Build Glass front (Gorilla Glass 5), plastic back, plastic frame Glass front (Corning-made glass), glass back, stainless steel frame
Dimensions 161.2 x 75.9 x 8.5 mm (6.35 x 2.99 x 0.33 in) 115.2 x 58.6 x 9.3 mm (4.54 x 2.31 x 0.37 in)
SIM Nano-SIM + Nano-SIM Micro-SIM
Weight 189.5 g (6.70 oz) 140 g (4.94 oz)
  - Scratch-resistant glass back panel
Comms
Bluetooth 4.2, A2DP, LE 4.0, A2DP, LE
NFC No -
Positioning GPS, GLONASS, BDS GPS, A-GPS, GLONASS
Radio FM radio No
USB microUSB 2.0, OTG 2.0
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct Wi-Fi 802.11 b/g/n, hotspot
Display
Protection Corning Gorilla Glass 5 Corning Gorilla Glass, oleophobic coating
Resolution 1080 x 2340 pixels, 19.5:9 ratio (~395 ppi density) 640 x 960 pixels, 3:2 ratio (~330 ppi density)
Size 6.53 inches, 104.7 cm2 (~85.6% screen-to-body ratio) 3.5 inches, 36.5 cm2 (~54.0% screen-to-body ratio)
Type IPS LCD IPS LCD
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Accelerometer, gyro, proximity, compass
Launch
Announced 2019, March. Released 2019, March 2011, October 04. Released 2011, October 14
Status Discontinued Discontinued
Main Camera
Features LED flash, HDR, panorama LED flash, panorama, HDR
Single - 8 MP, f/2.4, 35mm (standard), 1/3.2", 1.4µm, AF
Triple 24 MP, f/1.8, 1/2.8", 1.12µm, dual pixel PDAF 8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm 5 MP, f/2.4, (depth) -
Video 1080p@30fps 1080p@30fps
Memory
Card slot microSDXC (dedicated slot) No
Internal 64GB 6GB RAM, 128GB 6GB RAM 8GB 512MB RAM, 16GB 512MB RAM, 32GB 512MB RAM, 64GB 512MB RAM
  eMMC 5.1 -
Misc
Colors Topaz Blue, Glamour Red, Frozen Black, Royal Blue Black, White
Models 1819 A1431, A1387, iPhone4,1
SAR - 1.18 W/kg (head)     0.98 W/kg (body)    
SAR EU - 0.99 W/kg (head)     0.99 W/kg (body)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 1, 3, 5, 7, 8, 38, 40, 41 -
Speed HSPA, LTE HSPA 14.4/5.76 Mbps
Technology GSM / HSPA / LTE GSM / CDMA / HSPA / EVDO
  - CDMA2000 1xEV-DO
Platform
Chipset Mediatek MT6771 Helio P70 (12 nm) Apple A5 (45 nm)
CPU Octa-core (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53) Dual-core 1.0 GHz Cortex-A9
GPU Mali-G72 MP3 PowerVR SGX543MP2
OS Android 9.0 (Pie), Funtouch 9 iOS 5, upgradable to iOS 9.3.6
Selfie camera
Features HDR -
Single Motorized pop-up 32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm VGA, videocalling over Wi-Fi and 3G
Video 1080p@30fps 480p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes
Tests
Audio quality - Noise -91.2dB / Crosstalk -93.0dB
Battery (old) - Endurance rating 45h
Camera - Photo / Video
Display - Contrast ratio: 1261:1 (nominal) / 2.269:1 (sunlight)
Loudspeaker - Voice 65dB / Noise 64dB / Ring 74dB