BLU Grand M vs Cat S31
BLU Grand M
Cat S31
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Network
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2G networkGSM 850, 900, 1800, 1900GSM 850, 900, 1800, 1900
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3G networkHSDPA 850, 900, 1700(AWS), 1900, 2100HSDPA 850, 900, 1900, 2100 - EU; HSDPA 850, 900, 1700(AWS), 1900, 2100 - USA
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4G network-LTE frequency band 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 20(800) - EU; LTE frequency band 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 12(700), 17(700) - USA
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HSDPA speed21.1 Mbps-
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HSUPA speed5.76 Mbps-
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LTE speed-LTE, Cat4, 150 Mbps download, 50 Mbps upload
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2017-12017-9
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Status2017-12017-10
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Design
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SIMDual SIM (Nano-SIM/ Micro-SIM)Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by)
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Height144.9 mm146 mm
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Width72.1 mm74.4 mm
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Thickness9.4 mm12.6 mm
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Weight171 g200 g
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Waterproof-IP68, 1.2 m and 35 minutes
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Dust proof-IP68
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MIL-STD-810G-Yes - dust, humidity, rain, salt, vibration, solar radiation, transport and thermal shock resistant
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ColorsGold, gray, rose gold, silverBlack
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Display
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Display typeCapacitive touchscreenTFT capacitive touchscreen
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Physical size5.0 inches4.7 inches
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Resolution480 x 854 pixels720 x 1280 pixels
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Pixel density196 ppi312 ppi
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Display colors16777216-
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Protection-Corning Gorilla Glass 3
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MultitouchYesYes
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Hardware
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CPUQuad-core 1.3 GHzQuad-core 1.3 GHz ARM Cortex-A7
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ChipsetMediatek MT6580Qualcomm MSM8909 Snapdragon 210
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GPUMali-400Adreno 304
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Memory RAM512 MB2 GB
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Internal storage8 GB16 GB
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Memory cardmicroSDmicroSD
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Memory card max64 GB64 GB
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OS
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OSAndroid OS, v6.0 (Marshmallow)Android 7.0 (Nougat)
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Main camera
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Main camera5 MP8 MP
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Primary camera video720p@30fps720p@30fps
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Primary camera Autofocus-autofocus
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Primary camera flashLED flashLED flash
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Camera featuresGeo-tagging, face detection, touch focusGeo-tagging, face detection, touch focus
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Selfie camera
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FlashLED flash-
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Selfie camera3.15 MP2 MP
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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NotificationsVibration; MP3, WAV ringtonesVibration; MP3, WAV ringtones
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11nWi-Fi 802.11b, 802.11g, 802.11n
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WLAN WiFi HotspotYesYes
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USBmicroUSB 2.0microUSB 2.0
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USB On-The-Go-Yes
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Bluetoothv4.0v4.1
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Bluetooth A2DPYesYes
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bluetooth LE-Yes
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GPSYes, with A-GPSYes, with A-GPS
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GLONASS-Yes
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BDS-Yes
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Features
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Messaging SMSSMS(threaded view)SMS(threaded view)
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Messaging MMSMMSMMS
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Messaging EmailEmailEmail
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Messaging IMIMIM
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Messaging Push EmailPush EmailPush Email
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JavaNoNo
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SensorsAccelerometerAccelerometer, compass, proximity
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Browser
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HTMLHTML5HTML5
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Battery
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Battery typeLi-PoLi-Ion
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Battery capacity2200 mAh4000 mAh
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Battery removableNon-removableNon-removable
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Talk time 2G24 h-
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Talk time 3G12 h-
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Standby time 2G900 h-
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Standby time 3G750 h-
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Multimedia
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Radio FM-FM radio