Screen size
Energy 4004.0"
U506SWinner: 5.0"+20%
Quick verdict
U506S leads the measured specs 9-4.
Measured wins
Energy 400
4
spec wins
Ties
5
equal specs
U506S
9
spec wins
Overall winner
Screen size
Technology
Energy 400
GSM / HSPA
U506S
GSM / HSPA / LTE
2G bands
Energy 400
GSM 900 / 1900 / 850 - SIM 1 & SIM 2
U506S
GSM 850 / 900 / 1800 / 1900
3G bands
Energy 400
HSDPA 850 / 1900 - EM4EI043, HSDPA 900 / 2100 - EM4EI047
U506S
HSDPA 850 / 900 / 2100
Speed
Energy 400
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
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
U506S
HSPA, LTE
4G bands
Energy 400
-
U506S
1, 3, 4, 7, 8, 20, 28, 38, 40, 41
Announced
Energy 400
2015, January. Released 2015, June
U506S
2023, November
Status
Energy 400
Discontinued
U506S
Available. Released 2023, November
Dimensions
Energy 400
134.5 x 73.6 x 18.8 mm (5.30 x 2.90 x 0.74 in)
U506S
144.8 x 72.4 x 11.6 mm (5.70 x 2.85 x 0.46 in)
Weight
Energy 400
367 g (12.95 oz)
U506S
178 g (6.28 oz)
SIM
Energy 400
Mini-SIM
U506S
Nano-SIM + Nano-SIM
Other
Energy 400
IP68 dust tight and water resistant (immersible up to 1.8m for 30 min)
U506S
-
Type
Energy 400
IPS LCD
U506S
IPS LCD
Size
Energy 400
4.0 inches, 45.5 cm2 (~46.0% screen-to-body ratio)
U506S
5.0 inches, 68.9 cm2 (~65.7% screen-to-body ratio)
Resolution
Energy 400
480 x 800 pixels, 5:3 ratio (~233 ppi density)
U506S
480 x 854 pixels, 16:9 ratio (~196 ppi density)
OS
Energy 400
Android 4.4 (KitKat)
U506S
Android 13 (Go edition)
Chipset
Energy 400
Mediatek MT6572 (28 nm)
U506S
-
CPU
Energy 400
Dual-core 1.3 GHz Cortex-A7
U506S
Quad-core 1.5 GHz
GPU
Energy 400
Mali-400
U506S
-
Card slot
Energy 400
microSDXC (dedicated slot)
U506S
microSDHC
Internal
Energy 400
4GB 512MB RAM
U506S
32GB 2GB RAM
Other
Energy 400
-
U506S
eMMC 5.1
Single
Energy 400
8 MP, AF
U506S
-
Features
Energy 400
LED flash, HDR
U506S
LED flash
Video
Energy 400
720p@30fps
U506S
1080p@30fps
Dual
Energy 400
-
U506S
5 MP Auxiliary lens
Single
Energy 400
1.3 MP
U506S
2 MP
Video
Energy 400
U506S
1080p@30fps
Loudspeaker
Energy 400
Yes
U506S
Yes
3.5mm jack
Energy 400
Yes
U506S
Yes
WLAN
Energy 400
Wi-Fi 802.11 a/b/g/n, hotspot
U506S
Wi-Fi 802.11 a/b/g/n
Bluetooth
Energy 400
4.0, A2DP, LE
U506S
4.0, A2DP
Positioning
Energy 400
GPS
U506S
GPS
NFC
Energy 400
No
U506S
No
Radio
Energy 400
Stereo FM radio
U506S
FM radio
USB
Energy 400
microUSB 2.0
U506S
microUSB
Sensors
Energy 400
Accelerometer, proximity
U506S
Accelerometer, proximity
Type
Energy 400
Li-Ion 2400 mAh, removable
U506S
Li-Ion 3000 mAh battery, removable
Stand-by
Energy 400
Up to 400 h
U506S
-
Talk time
Energy 400
Up to 15 h
U506S
-
Colors
Energy 400
Gray
U506S
Black
Price
Energy 400
-
U506S
About 60 EUR