Screen size
Birdy4.5"
Y51Winner: 5.5"+17%
Quick verdict
Y51 leads the measured specs 7-3.
Measured wins
Birdy
3
spec wins
Ties
8
equal specs
Y51
7
spec wins
Overall winner
Screen size
Technology
Birdy
GSM / HSPA / LTE
Y51
GSM / HSPA
2G bands
Birdy
GSM 850 / 900 / 1800 / 1900
Y51
GSM 850 / 900 / 1800 / 1900
3G bands
Birdy
HSDPA 900 / 1900 / 2100
Y51
HSDPA 850 / 900 / 1900 / 2100
4G bands
Birdy
3, 7, 20
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
equal specsRAM
equal specsStorage
Main camera
equal specsFront camera
Battery
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
Birdy
HSPA 21.1/5.76 Mbps, LTE Cat4 150/50 Mbps
Y51
HSPA 42.2/5.76 Mbps
Announced
Birdy
2014, May. Released 2014, August
Y51
2021, January 14
Status
Birdy
Discontinued
Y51
Available. Released 2021, January 14
Dimensions
Birdy
132 x 67 x 9.6 mm (5.20 x 2.64 x 0.38 in)
Y51
146.6 x 72.3 x 9 mm (5.77 x 2.85 x 0.35 in)
Weight
Birdy
141 g (4.97 oz)
Y51
175 g (6.17 oz)
SIM
Birdy
Micro-SIM
Y51
Nano-SIM + Micro-SIM
Type
Birdy
IPS LCD
Y51
TN LCD
Size
Birdy
4.5 inches, 55.8 cm2 (~63.1% screen-to-body ratio)
Y51
5.45 inches, 76.7 cm2 (~72.3% screen-to-body ratio)
Resolution
Birdy
480 x 854 pixels, 16:9 ratio (~218 ppi density)
Y51
480 x 960 pixels, 18:9 ratio (~197 ppi density)
OS
Birdy
Android 4.4.2 (KitKat)
Y51
Android 10 (Go edition)
Chipset
Birdy
Mediatek MT6582 (28 nm)
Y51
-
CPU
Birdy
Quad-core 1.3 GHz Cortex-A7
Y51
Quad-core 1.3 GHz Cortex-A7
GPU
Birdy
Mali-400MP2
Y51
Mali-T820 MP1
Card slot
Birdy
microSDHC (dedicated slot)
Y51
microSDXC
Internal
Birdy
4GB 1GB RAM
Y51
8GB 1GB RAM, 16GB 1GB RAM
Single
Birdy
5 MP, AF
Y51
5 MP
Features
Birdy
LED flash, panorama, HDR
Y51
LED flash, HDR
Video
Birdy
720p@30fps
Y51
720p@30fps
Single
Birdy
2 MP
Y51
5 MP
Video
Birdy
Y51
Loudspeaker
Birdy
Yes, with stereo speakers
Y51
Yes
3.5mm jack
Birdy
Yes
Y51
Yes
WLAN
Birdy
Wi-Fi 802.11 b/g/n, hotspot
Y51
Wi-Fi 802.11 b/g/n
Bluetooth
Birdy
4.0, A2DP
Y51
4.2, A2DP
Positioning
Birdy
GPS
Y51
GPS
NFC
Birdy
No
Y51
No
Radio
Birdy
FM radio
Y51
FM Radio
USB
Birdy
microUSB 2.0, OTG
Y51
microUSB 2.0
Sensors
Birdy
Accelerometer, proximity, compass
Y51
Accelerometer, proximity
Type
Birdy
Li-Ion 2000 mAh battery
Y51
Li-Ion 2500 mAh, removable
Stand-by
Birdy
Up to 186 h (2G) / Up to 186 h (3G)
Y51
-
Talk time
Birdy
Up to 18 h 30 min (2G) / Up to 11 h (3G)
Y51
-
Colors
Birdy
Black, White, Fuchsia, Yellow, Coral, Violet, Bleen
Y51
Deep Grey, Gold, Mint
SAR
Birdy
0.51 W/kg (head) 1.05 W/kg (body)
Y51
0.70 W/kg (head) 1.55 W/kg (body)
SAR EU
Birdy
0.51 W/kg (head) 1.05 W/kg (body)
Y51
-
Price
Birdy
About 130 EUR
Y51
About 70 EUR
Models
Birdy
-
Y51
W-K211-TH