Siemens
Side-by-side technical data
Siemens SL55 vs Siemens AL21
Compare up to four phones using typed, normalized technical data. Measurements stay numeric, capabilities stay boolean, and options stay comparable.
The verdict
Neither runs away with it: each wins something.
Which one is for you?
Siemens SL55, if you care about…
- RAM Capacity
- 2 MB
- against 2 MB
- Maximum Storage Capacity
- 2 MB
- against 2 MB
Siemens AL21, if you care about…
- Battery Capacity
- 600 mAh
- against 500 mAh
- Display Technology
- TFT LCD
- against CSTN
- Body Thickness
- 19.2 mm
- against 22 mm
- Standby time
- 220 h
- against 210 h
Specification comparison
Battery
| Specification | SL55 | AL21 |
|---|---|---|
| Battery Efficiency Rating | — | — |
| Battery Capacity | 500 mAh | 600 mAh Best value |
| Battery Type | Li-Po | Li-Ion |
| Fast Charge Power | — | — |
| Battery Features | — | — |
| Battery Endurance | — | — |
| Wireless charging power | — | — |
| Charge cycles | — | — |
| Talk time | 5 h | 5 h |
| Standby time | 210 h | 220 h Best value |
| Music playback time | — | — |
Design
| Specification | SL55 | AL21 |
|---|---|---|
| Body Colors | — | Red, Black |
| Body Thickness | 22 mm | 19.2 mm Best value |
| Body Width | 45 mm | 45.8 mm |
| Body Height | 82 mm | 86.8 mm |
| Weight | 79 g | 78 g Best value |
| Usable Surface | — | — |
| Body Materials | — | — |
| Resistance Features | — | — |
| Waterproof Depth | — | — |
| Drop Resistance Class | — | — |
| Repairability Class | — | — |
| Foldable | No | No |
| Rugged Build | No | No |
| Drop Test Count | — | — |
| Unfolded thickness | — | 19.2 mm |
| QWERTY keyboard | — | — |
Performance
| Specification | SL55 | AL21 |
|---|---|---|
| Processor Model | — | — |
| Processor Process Size | — | — |
| Graphics GPU | — | — |
| Storage Type | — | — |
| Maximum CPU Clock | — | — |
| Maximum Storage Capacity | 2 MB Best value | 2 MB |
| AnTuTu Score | — | — |
| Geekbench 6 Single-Core | — | — |
| Geekbench 6 Multi-Core | — | — |
| CPU Description | — | — |
| Processor Type | — | — |
| 64-Bit Processor | — | — |
| RAM Capacity | 2 MB Best value | 2 MB |
| RAM Type | — | — |
| Expandable Storage | No | No |
| AnTuTu version | — | — |
| 3DMark Wild Life Extreme | — | — |
| Maximum memory card | — | — |
Sensors
| Specification | SL55 | AL21 |
|---|---|---|
| Fingerprint Sensor Placement | — | — |
Display
| Specification | SL55 | AL21 |
|---|---|---|
| Display Aspect Ratio | — | 1:1 |
| Peak Display Brightness | — | — |
| Display Technology | CSTN | TFT LCD Best value |
| Display Diagonal | — | — |
| Display Horizontal Resolution | 101 px | 130 px Best value |
| Display Vertical Resolution | 80 px | 130 px Best value |
| Display Pixel Density | — | — |
| Display Refresh Rate | — | — |
| Touch Sampling Rate | — | — |
| Display Contrast Ratio | — | — |
| Display Features | — | — |
| Integrated Projector | No | No |
| Projector Brightness | — | — |
| Projector Horizontal Resolution | — | — |
| Projector Vertical Resolution | — | — |
| Cover display diagonal | — | — |
| Cover display refresh rate | — | — |
| Cover display peak brightness | — | — |
| Display colors | 4,096 colors | 65K colors Best value |
Sensor
| Specification | SL55 | AL21 |
|---|---|---|
| Sensor Features | — | — |
Software
| Specification | SL55 | AL21 |
|---|---|---|
| Operating System | — | — |
| OS Family | — | — |
| OS Version | — | — |
| OS Update Support | — | — |
| Direct OS Updates | — | — |
| Google Services | — | — |
| Web browser | WAP 1.x | WAP 1.x |
| Java (J2ME) | Yes | Yes |
Connectivity
| Specification | SL55 | AL21 |
|---|---|---|
| SIM Configurations | Mini-SIM | Mini-SIM |
| Cellular Bands | 2G GSM 900, 2G GSM 1800, 2G GSM 1900 | 2G GSM 900, 2G GSM 1800, 2G GSM 1900 |
| Cellular Technologies | GSM, GPRS | GSM, GPRS |
| Wi-Fi Standards | — | — |
| Wi-Fi Features | — | — |
| Bluetooth Version | — | — |
| Bluetooth Profiles | — | — |
| Navigation Systems | — | — |
| Connectivity Features | Infrared | — |
| USB Version | — | Proprietary |
| SAR American Head | — | — |
| SAR American Body | — | — |
| SAR (EU) head | — | — |
| SAR (EU) body | — | — |
| Messaging | SMS, EMS, MMS, Email | SMS, EMS, MMS |
Audio
| Specification | SL55 | AL21 |
|---|---|---|
| Microphone Count | — | — |
| Audio Features | — | Loudspeaker |
| Alert types | Vibration, Downloadable ringtones, Polyphonic ringtones, Ringtone composer | Vibration, Polyphonic ringtones |
Technical
| Specification | SL55 | AL21 |
|---|---|---|
| EAN / GTIN | — | — |
| UPC | — | — |
| Launch price | — | — |
| MPN | — | — |
| Launch price (USD) | — | — |
Features
| Specification | SL55 | AL21 |
|---|---|---|
| Built-in functions | Predictive text input, Stopwatch, Organizer, Voice dial, Voice command, Voice memo | Predictive text input, Organizer |
