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Specifications
Selected: Celkon A402
Selected: vivo X9s
Network
TechnologyGSM / HSPAGSM / HSPA / EVDO / LTE
2G bandsGSM 900 / 1800 - SIM 1 & SIM 2GSM 900 / 1800 - SIM 1 & SIM 2
3G bandsHSDPA 2100 HSDPA 850 / 900 / 1900 / 2100
SpeedYes, 384 kbpsHSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
 CDMA2000 1xEV-DO & TD-SCDMA
4G bands1, 3, 4, 5, 8, 38, 39, 40, 41
Launch
Announced2015, June. Released 2015, June2017, July. Released 2017, July
StatusDiscontinuedDiscontinued
Body
Dimensions125.5 x 64 x 10.2 mm (4.94 x 2.52 x 0.40 in)152.6 x 74 x 7 mm (6.01 x 2.91 x 0.28 in)
Weight104 g (3.67 oz)154 g (5.43 oz)
SIMDual SIMNano-SIM + Nano-SIM
Display
TypeTFT, 256K colorsAMOLED
Size4.0 inches, 45.5 cm2 (~56.7% screen-to-body ratio)5.5 inches, 83.4 cm2 (~73.8% screen-to-body ratio)
Resolution480 x 800 pixels, 5:3 ratio (~233 ppi density)1080 x 1920 pixels, 16:9 ratio (~401 ppi density)
Platform
OSAndroid 4.4.2 (KitKat)Android 7.1 (Nougat), upgradable to Android 8.0 (Oreo), Funtouch 3.1
ChipsetSpreadtrum 7715Qualcomm MSM8976 Snapdragon 652 (28 nm)
CPU1.2 GHzOcta-core (4x1.8 GHz Cortex-A72 & 4x1.2 GHz Cortex A53)
GPUMali-400Adreno 510
Memory
Card slotmicroSDHCNo
Internal4GB 512MB RAM64GB 4GB RAM
 eMMC 5.1
Main Camera
Single3.15 MP16 MP, 1/2.8", PDAF
FeaturesLED flashLED flash, HDR, panorama
VideoYes1080p@30fps
Selfie Camera
Single1.3 MP20 MP, f/2.0, (wide), 1/2.8", 1.0µm
5 MP, depth sensor
Video
FeaturesLED flash
Sound
LoudspeakerYesYes
3.5mm jackYesYes
 32-bit/192kHz audio
Comms
WLANWi-Fi 802.11 b/g/nWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth4.0, A2DP4.2, A2DP, LE
PositioningGPSGPS
NFCNoNo
RadioFM radioNo
USBmicroUSB 2.0microUSB 2.0, OTG
Features
SensorsAccelerometerFingerprint (front-mounted), accelerometer, proximity, compass
Battery
TypeLi-Ion 2000 mAh batteryLi-Ion 3320 mAh, non-removable
Charging10W wired
Misc
ColorsWhite, Black, Blue, SilverGold, Rose Gold, Black
SAR EU0.46 W/kg (head)     0.82 W/kg (body)    
PriceAbout 350 EUR