Global system for mobile communication (GSM) is wide area wireless communications system that uses digital radio transmission to provide voice, data, and multimedia communication services. A GSM ...

Over on Hackaday.io, [bobricius] took this technology and designed something great. It’s a GSM cell phone with a case made out of FR4. It’s beautiful, and if you’re ever in need of a ...

He decided to go with the low-cost SIM800L GSM modem, but as it only works on 2G networks, provisions have been made in the board design to swap it out for a more modern module should you desire.

A team of biologists and engineers at UC San Diego applied advanced mathematical tools to answer a basic question in cell biology about how cells move and discovered that the mechanism looks very ...

The SIM card contains at least two numbers that identify the customer; the international mobile subscriber identity (IMSI) and a secret authentication key number K. The SIM contains a microprocessor, ...

While the best unlocked phones almost certainly support GSM carriers like AT&T and T-Mobile, it’s best to look for devices that work with all the major U.S. providers, including Verizon.

Cell membranes protect and organize cells. All cells have an outer plasma membrane that regulates not only what enters the cell, but also how much of any given substance comes in. Unlike ...

The sun is the ultimate source of energy for virtually all organisms. Photosynthetic cells are able to use solar energy to synthesize energy-rich food molecules and to produce oxygen.

In this way the customer ID (and personal number) is tied to the SIM card and not to a certain mobile phone. This allows for a seamless interchange of the same SIM card between different GSM ...

The exposure standard for wireless devices employs a unit of measurement known as the Specific Absorption Rate, or SAR. Unfortunately the limits set by the FCC/IC and the Concil of the European Union ...

It feels like the Splinter Cell remake has been on its way for a decent while now, which isn't helped by the fact it's been over two years since we heard anything official about the game.

Here’s how it works. There's a lot of things to consider when searching for the best cell phone plan, from coverage to perks. But when I'm evaluating plans, the question I ultimately ask myself ...