The Arduino ecosystem is an amazing learning tool, but even those of us who love it admit that even the simplified C Arduino uses isn’t the ideal teaching language. Those of us who remember ...

Of course, we’ve seen GSM and cell phone shields for Arduino before. Difficult to imagine sticking those in a dog collar, though, unless you have a fairly large dog.

Detailed features and specs for the Palm Treo 650 (GSM) for AT&T, Cellular One / Dobson. Plus discussion forum and photos ...

Nokia 6310 (2021) phone. Announced Jul 2021. Features 2.8″ display, Unisoc 6531F chipset, 1150 mAh battery, 16 MB storage, 8 MB RAM.

Nokia 130 (2023) phone. Announced Aug 2023. Features 2.4″ display, 1450 mAh battery, 4 MB storage, 4 MB RAM.

SMS is one of the oldest and most commonly used methods of mobile communication, but how does it work and what features does it offer?