The Sendo S1 was a feature phone that operated on GSM technology, a standard for most mobile phones during its era. It supported 2G network bands including GSM 900 and 1800, making it suitable for basic voice calls and text messaging. Although the phone included GPRS capabilities, which allowed for basic internet connectivity, it did not support EDGE technology or any advanced data services.
The Sendo S1 was announced in the first quarter of 2005. However, it is notable that the device never made it to wide-scale production and distribution, as the project was eventually cancelled. This makes the Sendo S1 a rare device that was primarily confined to prototype and demonstration phases, rather than achieving full commercial launch.
With a weight of 83 grams (2.93 ounces), the Sendo S1 was lightweight and easy to carry, adhering to the typical design ethos of feature phones of its time. It used a Mini-SIM card and featured a compact design, which was easy to handle. However, specific dimensions and external design details remain scant as the phone did not reach mass production.
The display specifications for the Sendo S1 were quite basic. The screen resolution stood at 96 x 64 pixels with a 3:2 aspect ratio, typical of basic phones designed primarily for calls and text messages rather than media consumption. Unfortunately, more detailed specifications about the type and size of the display remain largely unavailable.
The phone did not include a dedicated card slot for expanding storage, which was common in many feature phones of that era. It had phonebook capabilities, allowing users to store essential contact information. Additionally, the call records feature could differentiate between 30 received, dialed, and missed calls, offering basic call management features.
The Sendo S1 did not include a camera, which is characteristic of many basic feature phones at the time. With its focus on voice and text functionality, the absence of a camera meant there was more emphasis on battery life and simple use cases rather than multimedia capabilities.
The device was designed to offer polyphonic ringtones that could be downloaded, providing a customizable alert system. However, it lacked a loudspeaker and a 3.5mm audio jack, which limited its use for media playback like music and video calls. Vibration alerts were included, which were useful for silent notifications.
Connectivity options were minimal; there was no WLAN, Bluetooth, positioning (like GPS), or radio capabilities. As a feature phone, it did not include modern smartphone connectivity options such as Bluetooth or Wi-Fi. The phone did not support USB connectivity, limiting its ability to synchronize data or connect to a computer for file transfers, which are now standard features in mobile devices.
The Sendo S1 offered basic messaging capabilities, supporting SMS and MMS for standard text and multimedia messages. It also offered a WAP 2.0/xHTML browser, but with limited internet capabilities, which reflected the early state of mobile web browsing. The phone did not support Java applications, which restricted its expansion into additional apps beyond what was pre-installed. Information regarding additional sensors and gaming capabilities is sparse, largely due to the cancellation of the device.
One of the more notable features of the Sendo S1 was its battery life. A removable Li-Ion battery powered the phone, delivering a standby time of up to 425 hours and talk time of up to 7 hours. These figures highlight the efficiency of feature phones and the prioritization of long-lasting battery life over the more power-intensive functionalities of modern smartphones.
Details about the available color variants of the Sendo S1 are minimal, as with many aspects of this device. This lack of detail can be attributed to the early cancellation of the model's production and distribution, resulting in limited records of customization options that were available or planned for the device.
The Sendo S1, although never officially released, stands as a representation of its time in mobile technology. It highlights the incremental developments in basic mobile phone capabilities before the smartphone era took over. While it may not have seen mass production, its design and features reflect the evolution in technology that was taking place during the mid-2000s, leading towards more robust, feature-rich devices.
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