Screen size
A25Winner: 5.0"+52%
K451+ Sound Wave2.4"
Quick verdict
A25 leads the measured specs 8-1.
Measured wins
A25
8
spec wins
Overall winner
Ties
4
equal specs
K451+ Sound Wave
1
spec wins
Screen size
Technology
A25
GSM
K451+ Sound Wave
GSM
2G bands
A25
GSM 900 / 1800 / 1900 - SIM 1 & SIM 2
K451+ Sound Wave
GSM 900 / 1800 - SIM 1 & SIM 2
GPRS
A25
Yes
K451+ Sound Wave
Yes
EDGE
A25
Yes
K451+ Sound Wave
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
equal specsSD card
equal specsStereo speakers
No
Announced
A25
2013. Released 2013
K451+ Sound Wave
2012
Status
A25
Discontinued
K451+ Sound Wave
Discontinued
Dimensions
A25
146 x 78.6 x 10.5 mm (5.75 x 3.09 x 0.41 in)
K451+ Sound Wave
116.5 x 51.9 x 14.6 mm (4.59 x 2.04 x 0.57 in)
Weight
A25
150 g (5.29 oz)
K451+ Sound Wave
-
SIM
A25
Dual SIM
K451+ Sound Wave
Dual SIM (Mini-SIM)
Type
A25
TFT
K451+ Sound Wave
TFT, 65K colors
Size
A25
5.0 inches, 71.2 cm2 (~62.0% screen-to-body ratio)
K451+ Sound Wave
2.4 inches, 17.8 cm2 (~29.5% screen-to-body ratio)
Resolution
A25
480 x 800 pixels, 5:3 ratio (~187 ppi density)
K451+ Sound Wave
240 x 320 pixels, 4:3 ratio (~167 ppi density)
OS
A25
Android 4.0 (Ice Cream Sandwich)
K451+ Sound Wave
-
CPU
A25
Dual-core 1.0 GHz
K451+ Sound Wave
-
Card slot
A25
microSDHC (dedicated slot)
K451+ Sound Wave
microSDHC (dedicated slot)
Internal
A25
114MB
K451+ Sound Wave
-
Phonebook
A25
-
K451+ Sound Wave
500 entries
Call records
A25
-
K451+ Sound Wave
Yes
Single
A25
5 MP
K451+ Sound Wave
1.3 MP
Features
A25
LED flash
K451+ Sound Wave
-
Video
A25
Yes
K451+ Sound Wave
Yes
Single
A25
Yes
K451+ Sound Wave
-
Video
A25
K451+ Sound Wave
-
Other
A25
-
K451+ Sound Wave
No
Loudspeaker
A25
Yes
K451+ Sound Wave
Yes
3.5mm jack
A25
Yes
K451+ Sound Wave
Yes
WLAN
A25
Wi-Fi 802.11 b/g/n
K451+ Sound Wave
No
Bluetooth
A25
Yes
K451+ Sound Wave
2.0
Positioning
A25
No
K451+ Sound Wave
No
NFC
A25
No
K451+ Sound Wave
No
Radio
A25
FM radio
K451+ Sound Wave
FM radio, recording
USB
A25
Proprietary
K451+ Sound Wave
microUSB
Sensors
A25
Accelerometer, proximity
K451+ Sound Wave
Messaging
A25
-
K451+ Sound Wave
SMS, MMS
Games
A25
-
K451+ Sound Wave
Yes
Java
A25
-
K451+ Sound Wave
Yes
Other
A25
-
K451+ Sound Wave
Audio/video player Photo viewer Organizer
Type
A25
Li-Ion 2000 mAh battery
K451+ Sound Wave
Li-Ion 1800 mAh battery
Stand-by
A25
Up to 300 h
K451+ Sound Wave
Up to 500 h
Talk time
A25
Up to 6 h
K451+ Sound Wave
Up to 8 h
Colors
A25
White/Black
K451+ Sound Wave
Silver/Black
SAR EU
A25
0.50 W/kg (head)
K451+ Sound Wave
0.45 W/kg (head)
Price
A25
About 80 EUR
K451+ Sound Wave
About 20 EUR