Screen size
Rainbow UP 4G5.0"
Y51Winner: 5.5"+8.3%
Quick verdict
Rainbow UP 4G leads the measured specs 7-3.
Measured wins
Rainbow UP 4G
7
spec wins
Overall winner
Ties
8
equal specs
Y51
3
spec wins
Screen size
Technology
Rainbow UP 4G
GSM / HSPA / LTE
Y51
GSM / HSPA
2G bands
Rainbow UP 4G
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
Y51
GSM 850 / 900 / 1800 / 1900
3G bands
Rainbow UP 4G
HSDPA 900 / 1900 / 2100
Y51
HSDPA 850 / 900 / 1900 / 2100
4G bands
Rainbow UP 4G
1, 3, 7, 20
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
equal specsStorage
equal specsMain camera
Front camera
equal specsBattery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
equal specs5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
Y51
-
Speed
Rainbow UP 4G
HSPA 21.1/5.76 Mbps, LTE Cat4 150/50 Mbps
Y51
HSPA 42.2/5.76 Mbps
Announced
Rainbow UP 4G
2015, May. Released 2015, August
Y51
2021, January 14
Status
Rainbow UP 4G
Discontinued
Y51
Available. Released 2021, January 14
Dimensions
Rainbow UP 4G
143 x 71.1 x 8.4 mm (5.63 x 2.80 x 0.33 in)
Y51
146.6 x 72.3 x 9 mm (5.77 x 2.85 x 0.35 in)
Weight
Rainbow UP 4G
128 g (4.52 oz)
Y51
175 g (6.17 oz)
SIM
Rainbow UP 4G
Dual SIM (Micro-SIM, dual stand-by)
Y51
Nano-SIM + Micro-SIM
Type
Rainbow UP 4G
IPS LCD
Y51
TN LCD
Size
Rainbow UP 4G
5.0 inches, 68.9 cm2 (~67.8% screen-to-body ratio)
Y51
5.45 inches, 76.7 cm2 (~72.3% screen-to-body ratio)
Resolution
Rainbow UP 4G
720 x 1280 pixels, 16:9 ratio (~294 ppi density)
Y51
480 x 960 pixels, 18:9 ratio (~197 ppi density)
OS
Rainbow UP 4G
Android 5.0 (Lollipop)
Y51
Android 10 (Go edition)
Chipset
Rainbow UP 4G
Mediatek MT6735P (28 nm)
Y51
-
CPU
Rainbow UP 4G
Quad-core 1.0 GHz Cortex-A53
Y51
Quad-core 1.3 GHz Cortex-A7
GPU
Rainbow UP 4G
Mali-T720MP2
Y51
Mali-T820 MP1
Card slot
Rainbow UP 4G
microSDXC
Y51
microSDXC
Internal
Rainbow UP 4G
8GB 1GB RAM
Y51
8GB 1GB RAM, 16GB 1GB RAM
Single
Rainbow UP 4G
8 MP, AF
Y51
5 MP
Features
Rainbow UP 4G
LED flash, HDR, panorama
Y51
LED flash, HDR
Video
Rainbow UP 4G
720p@30fps
Y51
720p@30fps
Single
Rainbow UP 4G
5 MP
Y51
5 MP
Video
Rainbow UP 4G
Y51
Loudspeaker
Rainbow UP 4G
Yes, with stereo speakers
Y51
Yes
3.5mm jack
Rainbow UP 4G
Yes
Y51
Yes
WLAN
Rainbow UP 4G
Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot
Y51
Wi-Fi 802.11 b/g/n
Bluetooth
Rainbow UP 4G
4.0, A2DP
Y51
4.2, A2DP
Positioning
Rainbow UP 4G
GPS
Y51
GPS
NFC
Rainbow UP 4G
No
Y51
No
Radio
Rainbow UP 4G
FM radio
Y51
FM Radio
USB
Rainbow UP 4G
microUSB 2.0, OTG
Y51
microUSB 2.0
Sensors
Rainbow UP 4G
Accelerometer, proximity
Y51
Accelerometer, proximity
Type
Rainbow UP 4G
Li-Po 2800 mAh, non-removable
Y51
Li-Ion 2500 mAh, removable
Stand-by
Rainbow UP 4G
Up to 451 h (2G) / Up to 451 h (3G)
Y51
-
Talk time
Rainbow UP 4G
Up to 15 h (2G) / Up to 23 h 40 min (3G)
Y51
-
Colors
Rainbow UP 4G
Black, White, Bleen, Coral, Blue
Y51
Deep Grey, Gold, Mint
Models
Rainbow UP 4G
-
Y51
W-K211-TH
SAR
Rainbow UP 4G
-
Y51
0.70 W/kg (head) 1.55 W/kg (body)
Price
Rainbow UP 4G
-
Y51
About 70 EUR