The Smartphone Buying Checklist

Spec sheets make every phone look impressive. This checklist helps you focus on what affects daily use over several years.

1. Software update commitment

Check how many years of operating system and security updates the manufacturer promises for that specific model. A cheaper phone with long support can outlast a pricier one.

2. Battery and charging

Look for independent battery tests rather than the capacity number alone. Check whether a charger is included.

3. Camera for your use

If you mostly shoot people and documents in daylight, most modern phones do well. Low-light and zoom performance vary more; look at sample photos from reviewers.

4. Storage

Choose enough storage for at least the full period you plan to keep the phone. Check whether expandable storage is supported.

5. Repairability and warranty

Find out the cost of a screen or battery replacement and whether authorized repair is available where you live.

6. Carrier compatibility

In the US, confirm the phone supports the 5G and LTE bands used by your carrier (AT&T, T-Mobile, Verizon, or a prepaid brand that runs on their networks) and whether it is unlocked or tied to a carrier installment plan. Check eSIM support if you switch carriers often.

7. Total cost

Add up the full price in US dollars, not just the monthly installment: the device, state sales tax, a case, a charger if one is not included, any protection plan, and the carrier plan over the time you expect to keep the phone. A $20-per-month difference in plans adds up to $480 over two years.

8. Security features

A good lock-screen method and regular updates matter more than any single security marketing feature. Pair your new phone with the habits in Protecting Your Online Accounts.

9. Unlocked, carrier-locked or prepaid?

How you buy the phone affects what you can do with it later. A phone bought outright and unlocked can usually be used with any compatible carrier and is easier to resell. Phones bought on a carrier installment plan are often locked to that carrier until certain conditions are met, and promotional discounts are frequently delivered as monthly bill credits that stop if you leave early. Unlocking rules differ by carrier and have been the subject of FCC proceedings, so read your carrier's current unlocking policy before you sign, and ask how long the phone stays locked and what conditions apply.

Prepaid brands, including those owned by the major carriers and those that resell their networks, can cost much less per month. The trade-offs can include lower data priority during congestion, fewer perks and sometimes more limited international roaming. If your usage is modest, a prepaid plan paired with an unlocked phone is often the lowest total cost.

10. New, refurbished or previous generation?

You do not have to buy the newest model. Last year's flagship often receives several more years of updates and may be discounted. Manufacturer-certified refurbished phones typically come with a warranty and a new battery or a battery that meets a minimum health threshold; check the exact terms. When buying used from a private seller, confirm the phone is not reported lost or stolen, is not still tied to someone's carrier account or financing, and is signed out of the previous owner's Apple or Google account. Activation locks can make a phone unusable if the seller forgets this step.

11. Accessibility and comfort

Spend time with the phone in a store if you can. Size and weight matter more than spec sheets suggest, especially if you use the phone one-handed. Both iOS and Android include extensive accessibility features, including screen readers, magnification, captions, hearing aid support and voice control. If you rely on specific hearing aids, check the manufacturer's compatibility list; the FCC requires hearing aid compatibility ratings for phones sold in the US.

12. Ecosystem and switching costs

If you already use a smartwatch, earbuds, a laptop or a tablet, consider how well a new phone works with them. Messaging, photo libraries, purchased apps and backups can be tied to one ecosystem. Switching between iPhone and Android is easier than it used to be, with official migration tools from both Apple and Google, but some app purchases and subscriptions may not transfer. Factor that into the decision rather than discovering it after the purchase.

13. Privacy settings out of the box

During setup, take a few minutes to review permissions for location, microphone, camera, contacts and advertising identifiers. Both major platforms let you limit app tracking and see which apps have accessed sensitive permissions. Turn on device encryption (enabled by default on modern iPhones and most Android phones), set a strong passcode, and enable the find-my-device feature so you can locate, lock or erase the phone if it is lost.

14. Trade-ins and return windows

Carrier and manufacturer trade-in offers can be generous, but read the conditions: some values apply only to specific plans, are paid as bill credits over many months, or require the old phone to be in near-perfect condition. Compare against selling the old device yourself. Know the return window for the new phone, which varies by retailer and carrier and may include a restocking fee, so you can return it if it does not meet your needs. Before trading in or selling any phone, back it up, sign out of your accounts and perform a full factory reset.

A quick checklist to take to the store

• How many years of security updates does this model get?
• Does it support my carrier's bands and eSIM?
• Is it unlocked, and if not, when can it be unlocked?
• What is the total two-year cost in USD, including tax, accessories and plan?
• How much would a screen or battery repair cost?
• Is there enough storage for the whole time I plan to keep it?
• What is the return window and is there a restocking fee?

Putting it all together

The right phone is the one that fits how you actually use it, stays supported for as long as you plan to keep it, and costs what you expected over its whole life. Answer those questions first and the spec sheet becomes much easier to read.