Lava Z90 vs Xiaomi Redmi 4 (4X)

Phones Images
PHONES
Phone Names Lava Z90 Xiaomi Redmi 4 (4X)
Network
2G bandsGSM 900 / 1800 - SIM 1 & SIM 2GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bandsHSDPA 900 / 2100HSDPA 850 / 900 / 1900 / 2100
4G bands1, 3, 5, 40, 411, 3, 5, 7, 8, 38, 39, 40, 41
SpeedHSPA 42.2/5.76 Mbps, LTE Cat4 150/50 MbpsHSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/100 Mbps
TechnologyGSM / HSPA / LTEGSM / HSPA / LTE
Launch
Announced2017, September. Released 2017, September2017, May. Released 2017, May
StatusDiscontinuedDiscontinued
Body
Build-Glass front (Gorilla Glass), aluminum back, aluminum frame, plastic ends
Dimensions148.5 x 73.1 x 8.1 mm (5.85 x 2.88 x 0.32 in)139.2 x 70 x 8.7 mm (5.48 x 2.76 x 0.34 in)
SIMHybrid Dual SIM (Micro-SIM, dual stand-by)Nano-SIM + Micro-SIM
Weight159 g (5.61 oz)150 g (5.29 oz)
Display
ProtectionCorning Gorilla Glass 3Corning Gorilla Glass (unspecified version)
Resolution720 x 1280 pixels, 16:9 ratio (~282 ppi density)720 x 1280 pixels, 16:9 ratio (~294 ppi density)
Size5.2 inches, 74.5 cm2 (~68.7% screen-to-body ratio)5.0 inches, 68.9 cm2 (~70.7% screen-to-body ratio)
TypeIPS LCDIPS LCD
Platform
CPUQuad-core 1.3 GHz Cortex-A53Octa-core 1.4 GHz Cortex-A53
ChipsetMediatek MT6737 (28 nm)Qualcomm MSM8940 Snapdragon 435 (28 nm)
GPUMali-T720MP2Adreno 505
OSAndroid 7.0 (Nougat)Android 6.0.1 (Marshmallow), upgradable to 7.1.2 (Nougat), MIUI 11
Memory
Card slotmicroSDXC (uses shared SIM slot)microSDXC (uses shared SIM slot)
Internal32GB 3GB RAM16GB 2GB RAM, 16GB 3GB RAM, 32GB 3GB RAM, 64GB 3GB RAM, 64GB 4GB RAM
 eMMC 5.0eMMC 5.1
Main Camera
Dual8 MP, f/2.0, AF Auxiliary lens-
FeaturesLED flashLED flash, HDR, panorama
Single-13 MP, f/2.0, PDAF
Video1080p@30fps1080p@30fps
Selfie camera
FeaturesLED flash-
Single8 MP, f/2.05 MP, f/2.2
Video-1080p@30fps
Sound
3.5mm jack YesYes
35mm jackYesYes
Loudspeaker YesYes
Comms
Bluetooth4.0, A2DP4.2, A2DP, LE
Infrared port-Yes
NFCNoNo
PositioningGPS, GLONASSGPS, GLONASS, BDS
RadioFM radioFM radio
USBmicroUSB 2.0microUSB 2.0
WLANWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi DirectWi-Fi 802.11 b/g/n, Wi-Fi Direct
Features
SensorsFingerprint (rear-mounted), accelerometer, gyro, proximity, compassFingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Battery
Music play-Up to 87 h
Stand-by-Up to 432 h (3G)
Talk time-Up to 36 h (3G)
TypeLi-Ion 2750 mAh, non-removableLi-Po 4100 mAh, non-removable
Misc
ColorsBlue, GoldBlack, Gold
ModelsZ902016060, 2016090, MAG138, MAE136, Redmi 4, Redmi 4X
PriceAbout 10750 INRAbout 110 EUR
SAR-0.77 W/kg (head)     0.83 W/kg (body)
Tests
Audio quality- Noise -94.3dB / Crosstalk -94dB
Battery life- Endurance rating 80h
Camera- Photo / Video
Display- Contrast ratio: 915 (nominal), 2.920 (sunlight)
Loudspeaker- Voice 64dB / Noise 70dB / Ring 72dB
Performance- GeekBench: 1819 (v4.4) GFXBench: 5.1fps (ES 3.1 onscreen)
OUR TESTS
Audio quality-Noise -94.3dB / Crosstalk -94dB
Battery (old)-Endurance rating 80h
Camera-Photo / Video
Display-Contrast ratio: 915 (nominal), 2.920 (sunlight)
Loudspeaker-Voice 64dB / Noise 70dB / Ring 72dB
Performance-GeekBench: 1819 (v4.4) GFXBench: 5.1fps (ES 3.1 onscreen)