Screen size
Folder 2Winner: 2.8"+29%
U4002.0"
Quick verdict
Folder 2 leads the measured specs 6-4.
Measured wins
Folder 2
6
spec wins
Overall winner
Ties
4
equal specs
U400
4
spec wins
Screen size
Technology
Folder 2
GSM / HSPA / LTE
U400
GSM / UMTS
2G bands
Folder 2
GSM 850 / 900 / 1800 / 1900
U400
GSM 900 / 1800 / 1900
3G bands
Folder 2
HSDPA 900 / 2100
U400
UMTS 2100
4G bands
Folder 2
LTE
U400
Resolution
equal specsRefresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
equal specsFront camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
3.5mm jack
SD card
equal specsStereo speakers
-
Speed
Folder 2
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
U400
Yes, 384 kbps
Announced
Folder 2
2020, April 14. Released 2020, April 17
U400
2006, July
Status
Folder 2
Discontinued
U400
Discontinued
Dimensions
Folder 2
107.9 x 55 x 18 mm (4.25 x 2.17 x 0.71 in)
U400
99.8 x 48 x 20.4 mm (3.93 x 1.89 x 0.80 in)
Weight
Folder 2
127 g (4.48 oz)
U400
114 g (4.02 oz)
SIM
Folder 2
Nano-SIM
U400
Mini-SIM
Type
Folder 2
IPS LCD
U400
TFT, 256K colors
Size
Folder 2
2.8 inches, 24.3 cm2 (~40.9% screen-to-body ratio)
U400
2.0 inches, 12.4 cm2 (~25.9% screen-to-body ratio)
Resolution
Folder 2
240 x 320 pixels, 4:3 ratio (~143 ppi density)
U400
240 x 320 pixels, 4:3 ratio (~200 ppi density)
Other
Folder 2
External 0.9 inches monochrome display
U400
Downloadable wallpapers
Card slot
Folder 2
microSDXC
U400
microSD (dedicated slot)
Phonebook
Folder 2
Practically unlimited entries and fields, Photocal
U400
Yes, Photocall
Call records
Folder 2
Practically unlimited
U400
40 dialed, 40 received, 40 missed calls
Internal
Folder 2
8GB 1GB RAM
U400
-
Single
Folder 2
2 MP
U400
2 MP
Video
Folder 2
Yes
U400
Yes
Other
Folder 2
Uses main camera
U400
-
Single
Folder 2
-
U400
VGA videocall camera
Video
Folder 2
-
U400
Loudspeaker
Folder 2
Yes
U400
Yes
Alert types
Folder 2
-
U400
Vibration; Downloadable polyphonic ringtones
3.5mm jack
Folder 2
-
U400
No
WLAN
Folder 2
Wi-Fi 802.11 b/g/n
U400
No
Bluetooth
Folder 2
Yes
U400
2.0, A2DP
Positioning
Folder 2
GPS
U400
No
NFC
Folder 2
No
U400
-
Radio
Folder 2
FM radio
U400
No
USB
Folder 2
Yes
U400
Proprietary
Sensors
Folder 2
U400
Messaging
Folder 2
SMS(threaded view), MMS, Email, Push Email, IM
U400
SMS, EMS, MMS, Email
Games
Folder 2
Downloadable
U400
Yes
Java
Folder 2
No
U400
Yes, MIDP 2.0
Browser
Folder 2
-
U400
WAP 2.0/xHTML
Other
Folder 2
-
U400
Video telephony MP3/AAC/WMA/MP4 player Predictive text input Organizer
Type
Folder 2
Li-Ion 1470 mAh, removable
U400
Removable Li-Ion battery
Colors
Folder 2
White, Platinum Gray
U400
Black, Silver
Price
Folder 2
About 150 EUR
U400
-