Product
Xiaomi Mi 2A
Xiaomi Mi 2A
Vivo Y15
Vivo Y15
Battery
Type Li-Ion 2030 mAh, removable 5000 mAh, non-removable
Body
Build - Glass front, plastic back, plastic frame
Dimensions 133 x 66.5 x 9.5 mm (5.24 x 2.62 x 0.37 in) 159.4 x 76.8 x 8.9 mm (6.28 x 3.02 x 0.35 in)
SIM Mini-SIM Nano-SIM + Nano-SIM
Weight 133 g (4.69 oz) 190.5 g (6.74 oz)
Comms
Bluetooth 4.0, A2DP 5.0, A2DP, LE
NFC Yes No
Positioning GPS, GLONASS GPS, GLONASS, GALILEO, BDS
Radio FM radio FM radio
USB microUSB 2.0, OTG microUSB 2.0, OTG
WLAN Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Display
Resolution 720 x 1280 pixels, 16:9 ratio (~326 ppi density) 720 x 1544 pixels, 19.3:9 ratio (~268 ppi density)
Size 4.5 inches, 55.8 cm2 (~63.1% screen-to-body ratio) 6.35 inches, 99.6 cm2 (~81.4% screen-to-body ratio)
Type IPS LCD IPS LCD
Features
Sensors Accelerometer, gyro, proximity, compass Fingerprint (rear-mounted), accelerometer, proximity, compass
Launch
Announced 2013. Released 2013 2019, May 28. Released 2019, May
Status Discontinued Discontinued
Main Camera
Features LED flash, HDR LED flash, HDR, panorama
Single 8 MP, f/2.0, AF -
Triple - 13 MP, f/2.2, PDAF 8 MP, f/2.2, 16mm (ultrawide) 2 MP, f/2.4, (depth)
Video 1080p@30fps 1080p@30fps
Memory
Card slot No microSDXC (dedicated slot)
Internal 16GB 1GB RAM 64GB 4GB RAM
  - eMMC 5.1
Misc
Colors Black (front panel), 4 color options (back panel) Aqua Blue, Burgundy Red
SAR - 1.01 W/kg (head)     0.75 W/kg (body)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 900 / 1900 / 2100 HSDPA 850 / 900 / 2100
4G bands - 1, 3, 5, 8, 40, 41
Speed HSPA 21.1/5.76 Mbps HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
Technology GSM / HSPA GSM / HSPA / LTE
Platform
Chipset Qualcomm Snapdragon S4 Pro Mediatek MT6762 Helio P22 (12 nm)
CPU Dual-core 1.7 GHz Octa-core 2.0 GHz Cortex-A53
GPU Adreno 320 PowerVR GE8320
OS Android 4.1 (Jelly Bean) Android 9.0 (Pie), Funtouch 9
Selfie camera
Single 2 MP 16 MP, f/2.0, 26mm (wide), 1/3.06", 1.0µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes