Screen size
X1b—
XM—
Quick verdict
XM leads the measured specs 3-2.
Measured wins
X1b
2
spec wins
Ties
2
equal specs
XM
3
spec wins
Overall winner
Screen size
Technology
X1b
GSM
XM
GSM
2G bands
X1b
GSM 900 / 1800 / 1900
XM
GSM 900 / 1800 / 1900
GPRS
X1b
Yes
XM
Class 10
EDGE
X1b
No
XM
No
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
3.5mm jack
equal specsSD card
Stereo speakers
Announced
X1b
2005, Q2
XM
2005, Q2
Status
X1b
Discontinued
XM
Discontinued
Dimensions
X1b
102 x 44 x 18 mm (4.02 x 1.73 x 0.71 in)
XM
89 x 47 x 23.5 mm (3.50 x 1.85 x 0.93 in)
Weight
X1b
86 g (3.03 oz)
XM
91 g (3.21 oz)
SIM
X1b
Mini-SIM
XM
Mini-SIM
Type
X1b
TFT, 65K colors
XM
TFT, 256K colors
Size
X1b
XM
Resolution
X1b
128 x 128 pixels, 1:1 ratio
XM
176 x 220 pixels
Other
X1b
5-way navigation key
XM
Second external color display
Card slot
X1b
No
XM
MMC/SDIO
Phonebook
X1b
Yes
XM
250 entries, Photocall
Call records
X1b
Yes
XM
Yes
Internal
X1b
16MB
XM
13.8MB
Single
X1b
CIF
XM
1.3 MP
Video
X1b
No
XM
Yes
Other
X1b
No
XM
No
Loudspeaker
X1b
Yes
XM
No
Alert types
X1b
Vibration; Downloadable polyphonic ringtones
XM
Vibration; Downloadable polyphonic, MP3 ringtones
3.5mm jack
X1b
No
XM
No
WLAN
X1b
No
XM
No
Bluetooth
X1b
Yes
XM
No
Positioning
X1b
No
XM
No
Radio
X1b
No
XM
No
USB
X1b
XM
Sensors
X1b
XM
Messaging
X1b
SMS, EMS, MMS
XM
SMS, MMS
Browser
X1b
WAP 2.0/xHTML
XM
WAP 2.0/xHTML
Games
X1b
Yes
XM
Yes
Java
X1b
No
XM
Yes, MIDP 2.0
Other
X1b
Predictive text input Organizer
XM
MP3 player Predictive text input
Type
X1b
Removable Li-Ion battery
XM
Removable Li-Ion battery
Stand-by
X1b
Up to 200 h
XM
Up to 200 h
Talk time
X1b
Up to 3 h
XM
Up to 4 h
Colors
X1b
XM