Product
Xiaomi Mi 4s
Xiaomi Mi 4s
Xiaomi Mi CC9
Xiaomi Mi CC9
Battery
Charging 18W wired, QC2, 40% in 60 min 18W wired
Type Li-Ion 3260 mAh, non-removable Li-Po 4030 mAh, non-removable
Body
Build - Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame
Dimensions 139.3 x 70.8 x 7.8 mm (5.48 x 2.79 x 0.31 in) 156.8 x 74.5 x 8.7 mm (6.17 x 2.93 x 0.34 in)
SIM Nano-SIM + Micro-SIM Nano-SIM + Nano-SIM
Weight 133 g (4.69 oz) 179 g (6.31 oz)
Comms
Bluetooth 4.1, A2DP 5.0, A2DP, LE, aptX HD
Infrared port Yes Yes
NFC No Yes
Positioning GPS, GLONASS, BDS GPS, GLONASS, GALILEO, BDS
Radio No FM radio
USB USB Type-C USB Type-C 2.0
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Display
Protection - Corning Gorilla Glass 5
Resolution 1080 x 1920 pixels, 16:9 ratio (~441 ppi density) 1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)
Size 5.0 inches, 68.9 cm2 (~69.9% screen-to-body ratio) 6.39 inches, 100.2 cm2 (~85.8% screen-to-body ratio)
Type IPS LCD Super AMOLED, HDR, 430 nits (typ)
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Launch
Announced 2016, February. Released 2016, March 2019, July. Released 2019, July
Status Discontinued Discontinued
Main Camera
Features Dual-LED dual-tone flash, panorama, HDR LED flash, HDR, panorama
Single 13 MP, f/2.0, PDAF -
Triple - 48 MP, f/1.8, (wide), 1/2.0", 0.8µm, PDAF 8 MP, (ultrawide), 1/4.0", 1.12µm 2 MP, (depth)
Video 1080p@30fps, 720p@120fps 4K@30fps, 1080p@30/60/120fps, 720p@960fps
Memory
Card slot microSDXC (uses shared SIM slot) microSDXC (uses shared SIM slot)
Internal 64GB 3GB RAM 64GB 6GB RAM, 128GB 6GB RAM, 256GB 8GB RAM
  eMMC 5.0 UFS 2.1
Misc
Colors Black, White, Gold, Pink Black, Blue, White
Network
2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 1, 3, 7, 38, 39, 40, 41 1, 3, 5, 8, 34, 38, 39, 40, 41
Speed HSPA, LTE Cat4 150/50 Mbps HSPA, LTE
Technology GSM / CDMA / HSPA / LTE GSM / CDMA / HSPA / LTE
  TD-SCDMA CDMA 800 & TD-SCDMA
Our Tests
Audio quality Noise -94.9dB / Crosstalk -82.6dB -
Battery (old) Endurance rating 75h -
Camera Photo / Video -
Display Contrast ratio: 975:1 (nominal), 2.095 (sunlight) -
Loudspeaker Voice 73dB / Noise 68dB / Ring 82dB -
Performance Basemark OS II 2.0: 1545Basemark X: 12990 -
Platform
Chipset Qualcomm MSM8992 Snapdragon 808 (20 nm) Qualcomm SDM710 Snapdragon 710 (10 nm)
CPU Hexa-core (4x1.4 GHz Cortex-A53 & 2x1.8 GHz Cortex-A57) Octa-core (2x2.2 GHz Kryo 360 Gold & 6x1.7 GHz Kryo 360 Silver)
GPU Adreno 418 Adreno 616
OS Android 5.1 (Lollipop), upgradable to 7.0 (Nougat), MIUI 10 Android 9.0 (Pie), upgradable to Android 10, MIUI 11
Selfie camera
Features - HDR
Single 5 MP, f/2.0 32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes