Phone Comparison - Nokia Lumia 925 vs Microsoft Lumia 640 LTE vs Xiaomi Mi 4i

general General Info

Manufacturer Nokia Microsoft Xiaomi
Announced May 2013 March 2015 April 2015
Status Available - June 2013 Available - April 2015 Available - April 2015
Price - Rs. 7,999 ($117.63) [Similarly Priced] Rs. 8,999 ($132.34) [Similarly Priced]
Colors Black, White Yes Black, White, Blue, Yellow, Pink
Form Factor Candybar Candybar Candybar
Dimension 129 x 70.6 x 8.5 mm
(5.08 x 2.78 x 0.33 in)
141.3 x 72.2 x 8.8 mm
(5.56 x 2.84 x 0.35 in)
138.1 x 69.6 x 7.8 mm
(5.44 x 2.74 x 0.31 in)
Weight 139 g (4.9 oz) 145 g (5.11 oz) 130 g (4.59 oz)
2G Network GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Network HSDPA 850 / 900 / 1900 / 2100 - RM-892, RM-893
HSDPA 850 / 900 / 1700 / 1900 / 2100 - RM-910
HSDPA 850 / 900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G Network LTE 800 / 900 / 1800 / 2100 / 2600 - RM-892
LTE 700 / 1700 / 2100 - RM-893
LTE LTE
Messaging SMS, MMS, Push Mail, EMail, IM SMS, MMS, Push Mail, EMail, IM SMS, MMS, EMail, IM

hardware Hardware and OS

OS Microsoft Windows Phone 8 Microsoft Windows Phone 8.1 with Lumia Denim Android OS, v5.0 (Lollipop)
Processor Dual-core 1.5 GHz Krait, Qualcomm MSM8960 Snapdragon Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 Quad-core 1.7 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53, Qualcomm MSM8939 Snapdragon 615
GPU Adreno 225 Adreno 305 Adreno 405
RAM 1 GB 1 GB 2 GB
Internal Memory 16/32 GB storage 8 GB 16/32 GB
External Memory No microSD, up to 128 GB No

display Display

Type AMOLED capacitive touchscreen IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3, ClearBlack Display IPS LCD capacitive touchscreen
Colors 16M colors 16M colors 16M colors
Size 4.5 inches 5.0 inches 5.0 inches
Resolution 768 x 1280 pixels (332 ppi) 720 x 1280 pixels (294 ppi) 1080 x 1920 pixels (441 ppi)
Screen-to-Body Ratio 63.18% 67.43% 71.57%
Multi-Touch yes yes yes

multimedia Multimedia

3.5mm Jack yes yes yes
Radio FM radio FM radio FM radio
Games Yes + Downloadable Yes + Downloadable Yes + Downloadable
Loud Speaker yes yes yes

camera Camera

Rear Camera 8.7 MP, 3264 x 2448 pixels 8 MP, 3264 x 2448 pixels 13 MP, 4128 x 3096 pixels
Flash Dual-LED flash LED flash LED flash
Features PureView Technology, Geo-tagging, Touch Focus, Optical image stabilization, Still image editor, Face recognition Auto focus, 1/4'' Sensor Size Auto focus, Geo-tagging, Touch Focus, Face/smile Detection, Panorama, HDR
Video Yes, 1080p@30fps, video stabilization 1080p@30fps 1080p@30fps
Front Camera Yes, 1.2 MP wide Angle, 720p@30fps [Similar] 1 MP, 720p [Similar] 5 MP [Similar]

connectivity Connectivity and Data Rate

GPRS Class 12 (4+1/3+2/2+3/1+4 slots), 32 - 48 kbps Yes Yes
Edge Up to 236.8 kbps Yes Yes
3G HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps; LTE, Cat3, 50 Mbps UL, 100 Mbps DL HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps HSPA, LTE
Bluetooth Yes, v4.0 with A2DP, EDR v4.0, A2DP v4.0, A2DP
Wi-Fi Wi-Fi 802.11 a/b/g/n, dual-band, DLNA, Wi-Fi hotspot Wi-Fi 802.11 b/g/n, DLNA, hotspot Wi-Fi 802.11 a/b/g/n, dual-band, hotspot
USB Yes, microUSB v2.0 microUSB v2.0 microUSB v2.0
GPS Yes, with A-GPS support and GLONASS Yes, with A-GPS, GLONASS, Beidou Yes, with A-GPS, GLONASS
Browser HTML5 HTML5 HTML5

memory User Memory

Internal 16/32 GB storage, 1 GB RAM 8 GB, 1 GB RAM 16/32 GB, 2 GB RAM
Expandable Storage No microSD, up to 128 GB No

Apps Sensors

Fingerprint fingerprint not supported fingerprint not supported fingerprint not supported
Proximity Sensor proximity sensor present proximity sensor present proximity sensor present
Accelerometer Sensor accelerometer sensor present accelerometer sensor present accelerometer sensor present
NFC NFC supported NFC supported NFC not supported

battery Battery

Type Non-removable Li-Ion Battery (BL-4YW) Li-Ion Battery Li-Po Battery
Capacity 2000 mAh 2500 mAh 3120 mAh
Stand by Up to 440 h (3G) Up to 864 h (2G)
Up to 864 h (3G)
-
Talk Time Up to 18 h 18 min (2G)
Up to 12 h 48 min (3G)
Up to 26 h 30 min (2G)
Up to 17 h 30 min (3G)
-