Start here
A Plain Guide to Choosing a Phone or Tablet
How to choose among mobile devices by comparing screen, storage, battery and software support, and matching each to your real daily habits and budget.
Devices and Tools
Phones and Tablets
Understanding the phone or tablet in your pocket and how to look after it.
How App Permissions Work on Your Phone
What each phone permission lets an app do, from camera and microphone to location and contacts, and a simple routine for reviewing and tightening them.
How Mobile Operating Systems Differ
A plain comparison of iOS and Android covering how updates arrive, how app stores work and how much each lets you customise, to help you choose or switch.
How Phone Batteries Age and What Slows It Down
Why phone batteries lose capacity over time, how charge cycles and heat contribute, and what the battery health figure in settings does and does not tell you.
How Phone Screens Work: LCD, OLED and Refresh Rates
A plain explanation of LCD and OLED phone displays, what brightness numbers mean, and why a higher refresh rate makes scrolling and animation feel smoother.
Understanding Phone Cameras Beyond Megapixels
Why megapixels say little about photo quality: how sensor size, lenses and software processing shape what your phone camera captures, especially in low light.
What eSIM Is and How It Differs From a SIM Card
How an embedded SIM works compared with a physical card, how eSIM plans are activated, and what changes when you switch phones, travel or change provider.
What Phone Storage Really Means
Why a phone with 128 GB never has 128 GB free: how system files, apps, media and caches divide up the space, and why storage runs out faster than expected.
Why Phones Get Slower and What Actually Helps
The real reasons an older phone feels sluggish, from heavier software and full storage to background activity, and which fixes help, which do little, and when to replace.
Related topics
More in devices and tools
Computer Care Basics Choosing, tuning and protecting the computer you own. Cloud Tools for Small Teams What cloud storage, backup and work apps offer and where they fall short. Smart Home Voices Speakers and assistants in the home, and the trade-offs of living with them. Home Wi-Fi and Networking How home internet connections work and why they sometimes struggle. Files, Storage and Formats What files are, how they are stored and how formats differ.