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The Ericsson T20s was designed to operate on GSM networks, specifically supporting GSM 900 and 1800 bands. This was standard for many mobile phones of its era, ensuring broad compatibility across different regions. However, it lacked GPRS or EDGE capabilities, which means it did not support data features other than the basic text messaging service (SMS).
Launch and Discontinuation
Announced in 2000, the Ericsson T20s marked its presence during a period of vibrant innovation in the mobile phone industry. However, like many devices of its time, it was discontinued after a few years as technology advanced and consumer preferences shifted. The T20s remains a part of mobile telecom history, remembered for its specific form and functions that catered to the needs of early mobile phone users.
Body and Design
Weighing 128 grams and with dimensions of 101 x 54 x 28 mm, the Ericsson T20s was considered compact yet robust. It featured a unique body design for its time, emphasizing durability. The phone accepted Mini-SIM cards, the standard form factor before the advent of micro and nano-SIMs. Available in four distinct colors—Blue Whirl, Lime Twist, Silver Weave, and Beige Harmony—the phone offered a touch of personalization.
Display
The Ericsson T20s came with a monochrome graphic display that had a resolution of 101 x 33 pixels, capable of displaying 3 lines of text (12 characters each). This was typical for feature phones during that era, focusing primarily on text communication and basic interface elements.
Memory
This device did not feature a card slot, meaning additional memory could not be added. It could store up to 99 contacts in its phonebook and recorded the last 10 received, dialed, and missed calls. This limitation was consistent with many mobile phones of the time, as the primary function was centered around calls and simple messaging.
Sound and Alerts
The Ericsson T20s did not include a loudspeaker or a 3.5mm jack, reflecting its focus as a communication device rather than a media player. It supported a vibration alert and monophonic ringtones, which users could personalize using the built-in composer functionality, a novel feature at the time.
Communication and Connectivity
The phone did not support modern wireless connectivity options like WLAN or Bluetooth. Instead, it relied on direct SIM-based communication over its supported GSM bands. There was no in-built radio or USB connectivity, as these features were not typically integrated into devices of this class during the early 2000s.
Features and Entertainment
Functionalities on the Ericsson T20s included traditional phone features such as a clock, alarm, and SMS messaging capabilities. It also featured a basic WAP browser for minimal web surfing. In terms of entertainment, users could play four built-in games: Tetris, Erix, E-maze, and Ballpop. Moreover, it supported 24 languages, catering to a diverse global market.
Battery Life
The device was powered by a removable NiMH battery, offering a stand-by time of approximately 200 hours and a talk time up to 10 hours under ideal conditions. This was quite efficient considering the technological limitations and design focus of the time.
Key Features of Ericsson T20s
- GSM Technology: Supports GSM 900/1800 Bands
- Compact Design: Dimensions of 101 x 54 x 28 mm
- Reasonable Weight: Weighs 128 g
- Mini-SIM Card Support
- Monochrome Graphic Display with 101 x 33 pixels resolution
- Capacity to store 99 contacts in Phonebook
- Call Records: Stores 10 received, dialed, and missed calls
- Alerts: Vibration and Monophonic Ringtones with Composer
- Messaging: SMS Capabilities
- WAP Browser
- Preloaded Games: Tetris, Erix, E-maze, Ballpop
- Language Support: 24 Languages
- Removable NiMH Battery with Stand-by time of 200 hours and Talk time of 10 hours
- Available in 4 Colors: Blue Whirl, Lime Twist, Silver Weave, Beige Harmony
Disadvantages of Ericsson T20s
- Legacy GSM Technology: Limited to GSM 900/1800 bands with no GPRS or EDGE support.
- Discontinued Model: The phone was announced in 2000 and is no longer in production.
- Basic Display: Monochrome graphic display with low resolution (101 x 33 pixels).
- No Memory Expansion: There is no card slot available for memory expansion.
- Limited Phonebook: Can only store up to 99 contacts.
- No Camera: The phone does not include a camera.
- No Loudspeaker: Lacks a loudspeaker feature.
- No 3.5mm Audio Jack: Missing standard audio connectivity options.
- No Modern Connectivity Features: Lacks WLAN, Bluetooth, radio, and positioning capabilities.
- Limited Messaging: Only supports SMS messaging.
- No Java Support: Unable to support Java applications or applets.
- Basic Sound Alerts: Only supports vibration and monophonic ringtones.
- Old Battery Technology: Utilizes a removable NiMH battery, which is less efficient compared to modern batteries.
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