Siemens SL45
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| Manufacturer | Siemens AG |
|---|---|
| Compatible networks | GSM |
| Availability by country | 2001 - 2006 |
| Dimensions | 105 mm x 46 mm x 17 mm |
| CPU | Siemens/Infineon C166 |
| Removable storage | Hot-Swappable MMC |
| Battery | Lithium ion battery |
| Data inputs | Keypad |
| Display | 101 x 80 pixel, monochrome |
| Connectivity | IrDA |
Siemens SL45 was the first mobile phone with memory expansion and an MP3 player, which debuted in 2001. An improved version, the SL45i, was also the first phone to have a Java virtual machine.
In addition to the MP3 player, SL45 offered other advanced features such as dictaphone with several hours of recording time, auto responder, voice dialing and voice commands, browser, and context sensitive help in several languages. Other software include calendar/organizer, alarm clock, stopwatch, calculator, currency converter and games. While SL45 was one of the most advanced phones in its time, it was also one of the smallest.
The Siemens SL45 came in three versions:
These three phones are electronically identical, and the SL45i's firmware can be installed in the SL42 and SL45, thus enhancing them with a Java virtual machine.
The SL45 series was a professional model and thus very highly priced at the time of release. It was sometimes criticized for its bugginess, particularly in that simply sending too many SMSs could cause the phone to crash, and for being relatively delicate - there are many known issues of vibration alert, or MP3 player control buttons on the side of the case stopping functioning after phone fall.
The SL42, SL45 and SL45i share the same electronic components, and thus firmware can be exchanged between them. It can enhance functionality of SL42 and SL45 with Java support. Relatively simple structure of the firmware code, and the ease of new firmware installation (standard serial cable included in the box is suitable) led to many custom firmware modifications (patches) sprung over the Internet. These correct software bugs, change the phone's graphics, or even add new functionality like key remapping, calling pictures, or detailed battery information.
Due to the above-mentioned firmware enhanceability, availability of many Java applications further enhancing the feature set (with, for example, sending of long SMS messages, e-book reading, video playing, and E-mail client functionality), MP3 player functionality and memory card slot, and also for being fairly priced after a few years since its release, the SL45 series gained a huge user base, constantly developing new firmware patches, Java applications and hardware modifications, enhancing the phone's functionality. Many fans of the model claim that there is no mobile phone which can replace the SL45i (either the original one, or SL42/45 enhanced with SL45i firmware) for them.
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