Also known as: Smartphone, Smart phone, Mobile phone
A smartphone is a pocket-sized touchscreen computer with a cellular connection, sensors, and a battery, running apps — the most widespread computer on earth.1
Overview
Inside, a smartphone has the same building blocks as any computer — a CPU, RAM, and storage — most of them integrated into a single system-on-a-chip. Around that hub sit a touchscreen, a cellular modem and Wi-Fi radio, and a dense cluster of sensors: accelerometer, gyroscope, magnetometer, GPS, and more.
It runs a mobile operating system, almost always Apple’s iOS or Google’s Android, and the software it runs comes packaged as apps. The whole design is a negotiation with the battery: performance, screen brightness, and radio use are all traded against how long a single charge lasts.
Phone vs tablet vs wearable
The mobile tiers differ mostly in size, screen, and power budget:
| Trait | Smartphone | Tablet | Wearable |
|---|---|---|---|
| Screen | ~6 in | ~10 in | ~1–2 in / none |
| Cellular | Standard | Optional | Optional (eSIM) |
| Battery | A day+ | Days | Hours–a day |
| Primary role | Do-everything | Media, light work | Sensing, notify |
| Standalone | Yes | Yes | Often tethered |
The phone is the anchor of the group; tablets scale it up, wearables shrink it down.
Where it fits
For developers a smartphone is a deployment target, not a development machine: you write and build the software on a laptop or desktop, then run it on the phone. Apps are built with platform languages — Swift for iOS, Kotlin or Java for Android — covered under mobile app development. In an SDR setup a phone is somewhere to view decoded data over the capture node’s web console, not the machine doing the decoding.
Sources
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Smartphone — Wikipedia, on the pocket touchscreen computer and its platforms. ↩