Technology buying guide

How to choose a smartphone

Most phones today are good enough for everyday tasks, so the decision comes down to how long the phone will get security updates, battery life, the camera features you actually use, and enough storage. Checking the update promise is the easiest way to avoid a phone that becomes unsafe early.

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Weighted criteria

What matters when choosing smartphones

Weights add up to 100 and reflect how much each factor usually decides satisfaction. Change them to fit you in the scorecard.

  1. Software & security update period

    25%

    How many years the maker promises operating system and security updates.

    How to check: Find the written update policy for the exact model; count from the model's launch, not your purchase date.

  2. Battery life & charging

    20%

    Real-world endurance and how the battery holds up over time.

    How to check: Look for standardised battery endurance figures where available (for example on the EU energy label) and independent tests.

  3. Performance & storage

    15%

    Enough processing power and storage for your apps, photos and video for several years.

    How to check: Check your current phone's storage use and buy at least that plus room to grow.

  4. Camera for your use

    15%

    Low-light photos, video stabilisation, zoom: only the ones you use matter.

    How to check: Compare full-resolution sample photos in conditions you shoot, not marketing images.

  5. Repairability & durability

    15%

    Water and dust resistance, screen protection, and access to spare parts and repair.

    How to check: Check the ingress (IP) rating and whether authorised repair and parts are available where you live.

  6. Price & total cost

    10%

    Price including charger, case and any financing or trade-in conditions.

    How to check: Compare the outright price with any instalment plan's total cost.

Avoid

Red flags

  • No stated software update period.
  • A used phone whose seller will not let you check the IMEI or remove the previous owner's account lock.
  • Imported models that may not support your local network bands or carry a local warranty.
  • Prices far below market from unknown sellers.

Before you pay

Checklist

  1. Check the update policy for the exact model.
  2. Choose storage for your real usage.
  3. Confirm network band support for your carrier.
  4. For used phones, check the IMEI and that it is signed out of all accounts.
  5. Check warranty validity in your country.

Ask the seller

Questions to ask

  • Until when will this model get security updates?
  • Is the warranty valid in my country?
  • What does a battery or screen replacement cost?

After you buy

Warranty & returns

New phones usually carry a one year maker's warranty; some regions give longer statutory rights against faults (for example, the EU legal guarantee).

  • Know your statutory rights, which can go beyond the maker's warranty.
  • Accidental damage is usually excluded unless you buy separate cover.

Track the return window and warranty end date

Common mistakes

Myths vs facts

Myth More megapixels means better photos.

Fact Sensor size, lens quality and processing matter more than the pixel count.

Myth You need a flagship phone to be safe online.

Fact Any phone that still receives security updates and is kept updated is a sound base.

Where this comes from

Official sources

Criteria and weights are AltFTool's editorial judgement, not a statement by these bodies. This guide is general consumer information, not professional advice.

FAQ

Smartphones: common questions

How can I check a used phone in India?

The Department of Telecommunications' Sanchar Saathi portal lets you check an IMEI's status and report lost or stolen phones.

How long should a phone last?

Often as long as it gets security updates and the battery is serviceable. Check both before buying.

Is buying refurbished a good idea?

It can be, from a seller that offers a warranty, a clear grading system and a return window.

Free tools

Use these with this guide

Weighted scorecard

Review pattern checker

Complaint letter writer

Warranty & returns tracker

True cost calculator

Also handy: battery health and lifespan predictor, dead pixel screen test

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