How to Choose a Smartphone: The Specs That Really Matter

Published · 4 min read

200 megapixels, 120 Hz, 3,000 nits, 100 W charging: smartphone spec sheets look like a numbers race. But a bigger number doesn't always mean a better phone for you. To make the right choice, start from how you use your phone, then learn which specs really matter. Here's a guide to reading a spec sheet without falling into the traps.

Start with how you use it

Before looking at a single number, ask yourself a few questions:

Your answers will tell you which rows of the comparison to focus on, and which ones you can ignore.

The display: size, technology and smoothness

Screen size is given in inches and measured diagonally. Beyond 6.5 inches, one-handed use becomes difficult. Dimensions and weight, often overlooked, say as much as the diagonal about everyday comfort.

OLED technology (or AMOLED) offers deep blacks and better contrast than LCD; it now equips most mid-range and high-end models. The refresh rate (60, 90, 120 Hz) determines how smooth animations look: a 120 Hz screen makes scrolling noticeably more pleasant. So-called LTPO displays adapt this rate to the content to save battery.

Brightness, in nits, mainly matters for readability in direct sunlight. Be careful: the headline figure is often a peak value, reached only on a small part of the screen. As for resolution, beyond Full HD+ on a phone screen, the difference is hard to see with the naked eye.

Performance: processor, memory and storage

The processor (or chipset) determines overall speed, gaming performance and the quality of photo processing. For everyday use, a recent mid-range chip is more than enough; flagship chips are worth it for demanding games, video editing, or if you plan to keep the phone for a very long time.

RAM lets you keep several apps open without them reloading. On iPhone, a direct comparison with Android is less meaningful, since the system manages memory differently.

Storage is often underestimated. Photos, 4K videos and apps quickly fill 128 GB. If you film a lot or don't want to pay for cloud storage, aim for 256 GB. Also check for a microSD slot, which has become rare.

Cameras: don't be fooled by megapixels

This is where numbers are most misleading. A 200-megapixel sensor doesn't necessarily take better photos than a 48 or 50 MP sensor. Most very high-resolution sensors actually combine several pixels into one to capture more light, and produce 12 or 50 MP images by default.

What matters more:

For photography, nothing beats independent reviews and real sample shots.

Battery and charging

Battery capacity, in mAh, gives an indication of battery life, but it doesn't tell the whole story: the efficiency of the processor and screen, and how well the software is optimized, matter just as much. Two 5,000 mAh phones can have very different battery life.

Charging power, in watts, determines how fast the phone recharges. Check whether a charger is included in the box, and whether wireless charging is available if that matters to you.

Software support: the longevity factor

This is probably the most important row if you plan to keep your phone for several years. A device that no longer receives security updates becomes vulnerable and gradually loses compatibility with some apps. Several manufacturers now commit to six or seven years of updates for their recent models. Check the support period announced by the manufacturer for the model you're interested in.

Details that matter every day

In short

A good smartphone is the one that fits how you use it, not the one with the biggest numbers. Define your priorities, set aside the specs that don't concern you, then compare two or three models on what really matters to you: display, camera, battery life and length of software support. You'll make a better-informed choice, and often a cheaper one.