Xiaomi Redmi 4 (4X)

Network

• Technology: GSM / HSPA / LTE
• 2G bands: GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
• 3G bands: HSDPA 850 / 900 / 1900 / 2100
• 4G bands: 1, 3, 5, 7, 8, 38, 39, 40, 41
• Speed: HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/100 Mbps

Launch

• Announced: 2017, May
• Status: Available. Released 2017, May

Body

• Dimensions: 139.2 x 70 x 8.7 mm (5.48 x 2.76 x 0.34 in)
• Weight: 150 g (5.29 oz)
• Build: Glass front (Gorilla Glass), aluminum back, aluminum frame, plastic ends
• SIM: Hybrid Dual SIM (Nano-SIM/ Micro-SIM, dual stand-by)

Display

• Type: IPS LCD
• Size: 5.0 inches, 68.9 cm2 (~70.7% screen-to-body ratio)
• Resolution: 720 x 1280 pixels, 16:9 ratio (~294 ppi density)
• Protection: Corning Gorilla Glass (unspecified version)

Platform

• OS: Android 6.0.1 (Marshmallow), upgradable to 7.1.2 (Nougat), MIUI 11
• Chipset: Qualcomm MSM8940 Snapdragon 435 (28 nm)
• CPU: Octa-core 1.4 GHz Cortex-A53
• GPU: Adreno 505

Memory

• Card slot: microSDXC (uses shared SIM slot)
• Internal: 16GB 2GB RAM, 16GB 3GB RAM, 32GB 3GB RAM, 64GB 3GB RAM, 64GB 4GB RAM
• Note: eMMC 5.1

Main Camera

• Single: 13 MP, f/2.0, PDAF
• Features: LED flash, HDR, panorama
• Video: 1080p@30fps

Selfie camera

• Single: 5 MP, f/2.2
• Video: 1080p@30fps

Sound

• Loudspeaker: Yes
• 3.5mm jack: Yes

Comms

• WLAN: Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot
• Bluetooth: 4.2, A2DP, LE
• GPS: Yes, with A-GPS, GLONASS, BDS
• NFC: No
• Infrared port: Yes
• Radio: FM radio
• USB: microUSB 2.0

Features

• Sensors: Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass

Battery

• Type: Li-Po 4100 mAh, non-removable
• Stand-by: Up to 432 h (3G)
• Talk time: Up to 36 h (3G)
• Music play: Up to 87 h

Misc

• Colors: Black, Gold
• Models: 2016060, 2016090, MAG138, MAE136, Redmi 4, Redmi 4X
• SAR: 0.77 W/kg (head)     0.83 W/kg (body)    
• Price: About 110 EUR