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Articles on mobile phone technology

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Telstra’s new digital advertising payphones can be found at Melbourne’s Bourke Street Mall. In this photo, the older centre booth sits between two of Telstra’s larger high-tech booths. City of Melbourne

Telstra’s new high-tech payphones are meeting resistance from councils, but why?

The new payphones have Wi-Fi, mobile charging and transport information. But city councils are concerned they're digital billboards for Telstra, which could cost billions in lost productivity.
SIM cards contain a computer chip that can do some simple mathematics and store some data. Flickr/jbdodane

Curious Kids: How do SIM cards make a phone work?

SIM cards link accounts to handsets. They keep communications private. They store messages. Although small and simple, they are a big part of modern mobile phone systems.

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