Mobile Phone Deals: Split the Handset From the Airtime

A phone contract is two purchases sold as one number: a loan for a handset, and a mobile service. Bundled, they cannot be compared against anything. Split, the arithmetic becomes obvious, and it usually saves more than changing network does.

Why the bundle is hard to compare on purpose

A twenty-four-month contract at a monthly figure contains an interest-free loan for the handset plus an airtime charge, and the split is rarely shown. That means you cannot tell whether the deal is good service at a fair handset price, or the reverse.

The way to find out costs five minutes. Take the total you would pay over the whole term, subtract the cheapest SIM-only price that gives you the same allowance over the same period, and what remains is what you are paying for the handset.

Compare that figure against buying the phone outright. If it is meaningfully higher, you are paying interest on a loan described as a deal, and often a substantial amount of it.

The comparison worth running before anything else

Keeping your current handset and moving to SIM-only is nearly always the cheapest outcome, and it is the option the market is designed not to put in front of you. A phone that still works is a phone that still works.

Where you do want a new handset, buying it separately: new, refurbished, or on a genuinely zero-interest credit arrangement you have checked, and pairing it with SIM-only is usually cheaper than the bundled equivalent.

Refurbished is the underrated option. A model two generations old, professionally refurbished with a warranty, does everything most people use a phone for at a fraction of the price, and the airtime saving compounds on top.

The clause that catches people at the end

On some older-style contracts, the monthly payment continued unchanged after the handset was paid off, meaning customers kept paying for a phone they already owned. Rules have tightened, but the principle stands: know your contract end date and act on it.

Set a reminder for a month before the term ends. At that point you own the handset and the airtime is worth a fraction of what you were paying, so the same phone on SIM-only usually halves the bill.

Also check whether the contract permits an annual in-term price rise and what it is linked to. Those are common, they apply inside the period you committed to, and whether they grant an exit right depends on the wording.

Coverage decides the network, not the price

There are four mobile networks in the UK and a large number of brands riding on them. What matters at your address, your workplace and your commute is signal, and no tariff compensates for a network that does not reach where you are.

Check coverage for the specific places you spend time rather than the town, and ask people nearby what they use. Then check whether the brand you are considering runs on that network: the smaller brands are reselling one of the four.

Indoors matters more than outdoors, and the fix is free: Wi-Fi calling routes calls over your broadband and is supported by every large network on most modern handsets. Turn it on before concluding a network is bad.

Allowances, and how much data you actually use

Check your last three bills or the app for actual usage rather than estimating. Most people who buy a large allowance are paying for headroom they never touch, because home and work Wi-Fi cover the bulk of their consumption.

Where usage is genuinely high, the question becomes what unlimited excludes — fair-use clauses, tethering caps and deprioritisation at busy times are all common and all sit in the terms rather than the headline.

Roaming is the other allowance to check specifically, since European roaming charges returned in various forms and vary considerably between providers.

Insurance, and what you are probably already covered for

Phone insurance sold alongside a contract is one of the most consistently poor-value products in the market: a monthly premium, a substantial excess, and a replacement that is frequently refurbished rather than new. Over a two-year term the premiums often approach the cost of the handset.

Before buying any, check two places you may already have cover. Home contents insurance sometimes covers a phone in the house, and personal possessions cover extends it away from home, both subject to a single-article limit worth checking. And a packaged bank account frequently includes mobile cover, which people pay for monthly and insure separately without noticing.

Where you do want cover, standalone specialist insurers are usually cheaper than the network’s own product for the same protection. The things to compare are the excess, whether the replacement is new or refurbished, and whether loss is covered at all, theft and damage frequently are, and simply losing the phone frequently is not.

• Related pages

• SIM-only deals

  The airtime half on its own, and what a rolling contract is worth against a twelve-month one.

• Mobile broadband

  Data for devices that move, and when tethering makes a separate SIM unnecessary.

• Unlimited data plans

  What unlimited excludes: fair use, tethering caps and deprioritisation at peak.

• Internet dongles

  Whether a dedicated device still has a purpose now that every phone can share its connection.

• 5G home broadband

  The mobile network as a replacement for a fixed line at home.

Frequently asked questions