Screen size
Astro X44.0"
Astro X55Winner: 5.5"+27%
Quick verdict
Astro X55 leads the measured specs 9-2.
Measured wins
Astro X4
2
spec wins
Ties
6
equal specs
Astro X55
9
spec wins
Overall winner
Screen size
Technology
Astro X4
GSM / HSPA
Astro X55
GSM / HSPA
2G bands
Astro X4
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
Astro X55
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
Astro X4
HSDPA 850 / 1700(AWS) / 1900
Astro X55
HSDPA 850 / 1700(AWS) / 1900
Speed
Astro X4
HSPA 21.1/5.76 Mbps
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
equal specs5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
Astro X55
HSPA 21.1/5.76 Mbps
Announced
Astro X4
2016, January. Released 2016, February
Astro X55
2016, January. Released 2016, February
Status
Astro X4
Discontinued
Astro X55
Discontinued
Dimensions
Astro X4
123.5 x 64 x 9.8 mm (4.86 x 2.52 x 0.39 in)
Astro X55
150.5 x 76.3 x 7.8 mm (5.93 x 3.00 x 0.31 in)
Weight
Astro X4
122 g (4.30 oz)
Astro X55
174 g (6.14 oz)
SIM
Astro X4
Dual SIM (Dual stand-by)
Astro X55
Dual SIM (Dual stand-by)
Type
Astro X4
TFT, 256K colors
Astro X55
IPS LCD
Size
Astro X4
4.0 inches, 45.5 cm2 (~57.6% screen-to-body ratio)
Astro X55
5.5 inches, 83.4 cm2 (~72.6% screen-to-body ratio)
Resolution
Astro X4
480 x 800 pixels, 5:3 ratio (~233 ppi density)
Astro X55
720 x 1280 pixels, 16:9 ratio (~267 ppi density)
OS
Astro X4
Android 4.4 (KitKat)
Astro X55
Android 5.1 (Lollipop)
Chipset
Astro X4
Mediatek MT6572M (28 nm)
Astro X55
Mediatek MT6580 (28 nm)
CPU
Astro X4
Dual-core 1.0 GHz Cortex-A7
Astro X55
Quad-core 1.5 GHz Cortex-A7
GPU
Astro X4
Mali-400
Astro X55
Mali-400MP2
Card slot
Astro X4
microSDHC
Astro X55
microSDHC
Internal
Astro X4
4GB 512MB RAM
Astro X55
8GB 1GB RAM
Single
Astro X4
3.15 MP
Astro X55
8 MP, AF
Features
Astro X4
LED flash
Astro X55
LED flash
Video
Astro X4
720p
Astro X55
720p
Single
Astro X4
VGA, LED flash
Astro X55
5 MP
Video
Astro X4
Astro X55
Loudspeaker
Astro X4
Yes
Astro X55
Yes
3.5mm jack
Astro X4
Yes
Astro X55
Yes
WLAN
Astro X4
Wi-Fi 802.11 b/g/n, hotspot
Astro X55
Wi-Fi 802.11 b/g/n, hotspot
Bluetooth
Astro X4
4.0, A2DP
Astro X55
4.0, A2DP
Positioning
Astro X4
GPS
Astro X55
GPS
NFC
Astro X4
No
Astro X55
No
Radio
Astro X4
Stereo FM radio
Astro X55
Stereo FM radio
USB
Astro X4
microUSB 2.0
Astro X55
microUSB 2.0
Sensors
Astro X4
Accelerometer, proximity
Astro X55
Accelerometer, proximity
Type
Astro X4
Li-Ion 1400 mAh, removable
Astro X55
Li-Ion 2200 mAh, removable
Stand-by
Astro X4
Up to 180 h
Astro X55
Up to 350 h
Talk time
Astro X4
Up to 8 h
Astro X55
Up to 14 h
Colors
Astro X4
White, Black, Blue, Gold, Pink
Astro X55
Gold/White