Screen size
A4Winner: 4.0"+56%
K1+ Stereo1.8"
Quick verdict
A4 leads the measured specs 8-1.
Measured wins
A4
8
spec wins
Overall winner
Ties
3
equal specs
K1+ Stereo
1
spec wins
Screen size
Technology
A4
GSM / HSPA
K1+ Stereo
GSM
2G bands
A4
GSM 850 / 1900 - SIM 1 & SIM 2, GSM 900 / 1800 - SIM 1 & SIM 2
K1+ Stereo
GSM 900 / 1800 - SIM 1 & SIM 2
3G bands
A4
HSDPA 900 / 2100 , HSDPA 850 / 1900
K1+ Stereo
-
Speed
A4
HSPA
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
USB
5G support
equal specsNFC
equal specs3.5mm jack
SD card
equal specsStereo speakers
K1+ Stereo
-
GPRS
A4
-
K1+ Stereo
Yes
EDGE
A4
-
K1+ Stereo
No
Announced
A4
2013, March. Released 2013, March
K1+ Stereo
2012
Status
A4
Discontinued
K1+ Stereo
Discontinued
Dimensions
A4
124.8 x 66 x 9.5 mm (4.91 x 2.60 x 0.37 in)
K1+ Stereo
109 x 44 x 14.4 mm (4.29 x 1.73 x 0.57 in)
Weight
A4
75 g (2.65 oz)
K1+ Stereo
78 g (2.75 oz)
SIM
A4
Dual SIM (Mini-SIM)
K1+ Stereo
Dual SIM (Mini-SIM)
Type
A4
TFT, 256K colors
K1+ Stereo
TFT, 65K colors
Size
A4
4.0 inches, 47.6 cm2 (~57.8% screen-to-body ratio)
K1+ Stereo
1.77 inches, 9.9 cm2 (~20.6% screen-to-body ratio)
Resolution
A4
320 x 480 pixels, 3:2 ratio (~144 ppi density)
K1+ Stereo
128 x 160 pixels (~116 ppi density)
OS
A4
Android 2.3.6 (Gingerbread)
K1+ Stereo
-
Card slot
A4
microSDHC (dedicated slot)
K1+ Stereo
microSDHC (dedicated slot)
Internal
A4
256MB 512MB
K1+ Stereo
-
Phonebook
A4
-
K1+ Stereo
250 entries
Call records
A4
-
K1+ Stereo
Yes
Single
A4
3.15 MP
K1+ Stereo
VGA
Video
A4
Yes
K1+ Stereo
Yes
Single
A4
Yes
K1+ Stereo
-
Video
A4
K1+ Stereo
-
Other
A4
-
K1+ Stereo
No
Loudspeaker
A4
Yes
K1+ Stereo
Yes
3.5mm jack
A4
Yes
K1+ Stereo
No
WLAN
A4
Wi-Fi 802.11 b/g/n, hotspot
K1+ Stereo
No
Bluetooth
A4
Yes
K1+ Stereo
2.0
Positioning
A4
No
K1+ Stereo
No
NFC
A4
No
K1+ Stereo
No
Radio
A4
FM radio
K1+ Stereo
FM radio
USB
A4
Proprietary
K1+ Stereo
microUSB
Sensors
A4
Accelerometer
K1+ Stereo
Messaging
A4
-
K1+ Stereo
SMS
Games
A4
-
K1+ Stereo
Yes
Java
A4
-
K1+ Stereo
Yes
Other
A4
-
K1+ Stereo
Audio/video player Photo viewer Organizer
Type
A4
Li-Ion 1400 mAh battery
K1+ Stereo
Li-Ion 1000 mAh, removable
Stand-by
A4
Up to 250 h
K1+ Stereo
Up to 250 h
Talk time
A4
Up to 4 h 20 min
K1+ Stereo
Up to 5 h
Colors
A4
White/Black
K1+ Stereo
White/Black, Black/Red
Price
A4
About 70 EUR
K1+ Stereo
About 30 EUR
SAR EU
A4
-
K1+ Stereo
0.85 W/kg (head)