O2 X1b
#11428
Siemens AL21
#11636Category Breakdown
O2 X1b
Siemens AL21
Performance
18.28.6
Camera
0.02.5
Display
19.520.0
Battery
1.63.8
Build
0.20.2
Connectivity
7.71.8
Audio
8.98.9
Overall
5.74.7
Summary
- The O2 X1b and Siemens AL21 both exhibit basic build quality typical of their 2005 release, with the O2 X1b being slightly heavier at 86g compared to the AL21's 78g.
- The displays are similar in type, but the AL21 has a marginally higher resolution of 130 x 130 pixels versus the X1b's 128 x 128 pixels, resulting in a slightly better pixel density.
- In terms of performance, the AL21 offers more RAM at 1.5GB compared to the X1b's 16MB, which may enhance multitasking capabilities.
- Both devices lack rear and selfie cameras, limiting their photographic functionality.
- The Siemens AL21 features a 600mAh battery, providing some power advantage over the O2 X1b, which has no specified battery capacity.
- Both phones run on basic software experiences without advanced features, and neither supports modern connectivity options like WiFi or Bluetooth.
Side-by-side Specification Comparison
O2 X1b
Siemens AL21
General
Release Date
2005
2005
Announced
2005
2005
Description
N/A
N/A
Display
Size
N/A
N/A
Type
TFT, 65K colors
TFT, 65K colors
Resolution
128 x 128 pixels, 1:1 ratio
130 x 130 pixels, 1:1 ratio
PPI
128
130
Refresh Rate
60Hz
60Hz
HDR Support
✗
✗
Protection
N/A
N/A
Performance
Chipset
N/A
N/A
CPU
N/A
N/A
GPU
N/A
N/A
Memory
16MB
1.5MB
Expandable Storage
✗
✗
Card Slot
No
No
Camera
Main Camera
CIF
N/A
Main Camera Features
N/A
N/A
Front Camera
N/A
N/A
Front Camera Features
N/A
N/A
Video Recording
No
N/A
Selfie Video
N/A
N/A
Optical Stabilization
✗
✗
Night Mode
✗
✗
Raw Photo Support
✗
✗
Battery
Capacity
N/A
600 mAh
Battery Details
Removable Li-Ion battery
Removable Li-Ion 600 mAh battery
Charging Details
N/A
N/A
Fast Charging
✗
✗
Wireless Charging
✗
✗
Build & Safety
Dimensions
102 x 44 x 18 mm (4.02 x 1.73 x 0.71 in)
86.8 x 45.8 x 19.2 mm (3.42 x 1.80 x 0.76 in)
Weight
86 g
78 g
Materials
N/A
N/A
Colors
N/A
Red Temptation, Black Magic
Foldable
✗
✗
SAR
N/A
N/A
Connectivity
SIM
Mini-SIM
Mini-SIM
Network
GSM
GSM
Network Speed
N/A
N/A
5G
✗
✗
4G
✗
✗
WiFi
No
No
Bluetooth
Yes
No
NFC
✗
✗
USB
N/A
Proprietary
IR Blaster
✗
✗
Headphone Jack
✗
✗
Radio
✗
✗
Positioning
No
No
Audio
Stereo Speakers
✗
✗
Loudspeaker
Yes
Yes
Audio Jack
No
No
Software & Security
Operating System
N/A
N/A
Fingerprint
✗
✗
Face Unlock
✗
✗
Sensors
N/A
N/A