Screen size
A66Winner: 2.4"+17%
U532.0"
Quick verdict
A66 leads the measured specs 4-1.
Measured wins
A66
4
spec wins
Overall winner
Ties
5
equal specs
U53
1
spec wins
Screen size
Technology
A66
GSM
U53
GSM
2G bands
A66
GSM 900 / 1800 - SIM 1, GSM 900 / 1800 - SIM 2
U53
GSM 900 / 1800
GPRS
A66
Class 10
U53
Class 10
EDGE
A66
No
U53
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
equal specsWired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
5G support
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
No
Announced
A66
2010. Released 2010
U53
2010. Released 2010, April
Status
A66
Discontinued
U53
Discontinued
Dimensions
A66
100 x 49 x 15.5 mm (3.94 x 1.93 x 0.61 in)
U53
111 x 59.3 x 13.4 mm (4.37 x 2.33 x 0.53 in)
Weight
A66
-
U53
-
SIM
A66
Dual SIM (Mini-SIM, dual stand-by)
U53
Dual SIM (Mini-SIM)
Keyboard
A66
-
U53
QWERTY
Type
A66
TFT, 65K colors
U53
TFT, 65K colors
Size
A66
2.4 inches, 17.8 cm2 (~36.4% screen-to-body ratio)
U53
2.0 inches
Resolution
A66
240 x 320 pixels, 4:3 ratio (~167 ppi density)
U53
Other
A66
Secondary hidden display
U53
-
Card slot
A66
microSD (dedicated slot)
U53
microSD (dedicated slot)
Phonebook
A66
Yes
U53
Yes
Call records
A66
Yes
U53
Yes
Single
A66
2 MP
U53
Yes
Video
A66
No
U53
No
Other
A66
No
U53
No
Loudspeaker
A66
Yes
U53
Yes
3.5mm jack
A66
No
U53
No
WLAN
A66
No
U53
No
Bluetooth
A66
2.0
U53
2.0
Positioning
A66
No
U53
No
Radio
A66
FM radio
U53
FM radio
USB
A66
No
U53
No
Sensors
A66
U53
Messaging
A66
SMS, MMS
U53
SMS, MMS
Browser
A66
WAP 2.0/xHTML
U53
WAP 2.0/xHTML
Games
A66
No
U53
No
Java
A66
Yes, MIDP 2.0
U53
Yes, MIDP 2.0
Other
A66
MP3/MP4 player Predictive text input
U53
MP3/MP4 player Yahoo and Skype apps Predictive text input
Type
A66
Removable Li-Ion 1000 mAh battery
U53
Removable Li-Ion 1000 mAh battery
Colors
A66
Pink, Black
U53
Black