T28s

Overview

The T28s combines a slim body, a side-released keypad flip and a compact antenna. Its GSM 900 / 1800 radio and Ultra Slim lithium-polymer battery belong to this model; optional packs and the WORLD version need separate identification.

Period and variants

Ericsson’s history dates the T28 introduction to January 1999; the Mobile Phone Museum gives 28 January. The manufacturer also records delayed delivery, while a September loan-unit test already exists. These records do not establish one worldwide retail day.

The T28s uses GSM 900 / 1800; T28 WORLD uses 900 / 1900. Combining them would create a fictitious tri-band configuration. A miscategorized WORLD photograph has therefore been excluded.

Dimensions differ between the original guide and German brochure, so both are shown. The 83 g specification uses the Ultra Slim battery. BUS-10 is 500 mAh; larger 650 and 1400 mAh options change thickness, weight and endurance. The handset has no integrated infrared port: the guide’s infrared connection uses an external modem accessory.

Sources

• Ericsson — original T28s user guide, technical data and accessories; mirror
• Ericsson — original German T28s product and battery brochure; mirror
• Ericsson — original T28 introduction and delivery history
• ITavisen — Ericsson Norway loan handset review, 23 September 1999
• Ericsson — original 22 September 1999 T28 WORLD announcement and T28s distinction
• Mobile Phone Museum — physical T28s collection history

Image credit

Holger Ellgaard — Ericsson T28s.jpg · CC BY-SA 4.0. Commons thumbnail resize; no further edits. Shared under the same licence.

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Images collected from the Internet.