SIM-Only vs Contract: Compare the Full Phone Cost

Check three recent bills for data, calls, roaming and extras. Identify unused insurance or subscriptions, but check existing cover and cancellation terms before removing protection you need. Check whether an employer-provided phone or discount already meets the need, including permitted personal use and what happens when you leave the job.

Inspect your current phone’s battery, storage, accessibility features and remaining security-update support with the manufacturer. Get a repair quote if appropriate. Keeping a phone with reliable support can cost less than replacing it, but a failing or unsupported device may not be a sensible long-term option.

Ofcom’s money-saving checklist includes considering SIM-only when you already have a suitable handset. Also check social-tariff eligibility if you receive qualifying benefits. Neither route guarantees it is the cheapest suitable choice.

For the two new-phone options, match the model, storage, condition, warranty and useful life. Refurbished can be a worthwhile separate option; do not label it an identical new-phone comparison. For service, match what you need rather than paying to reproduce an unnecessarily large allowance.

Check Ofcom’s coverage information for home, work and regular journeys, then check the provider’s own features and coverage information. Predictions are not an indoor-service guarantee. Confirm Wi-Fi calling, eSIM, tethering, roaming destinations and excess-use charges where relevant.

Hypothetical prices, not current offers. Assume the same suitable new handset and equivalent service. Buying outright costs £480. The SIM is £10 a month for 12 months then £11 for 12. The handset contract costs £60 upfront, then £32 a month for 12 months and £34 for 12. Assume no other fees, interest, rewards or remaining balances.

Buying plus SIM-only costs £120 less, equivalent to £5 a month across the comparison. It needs £420 more upfront than the illustrated contract. If borrowing to buy the phone added £150 to the total, that option would cost £882 and become £30 dearer. Use the actual total amount payable under any credit agreement, not just its monthly instalment.

If the existing phone remained suitable for all 24 months without repair, SIM service alone would cost £252 under the same assumed prices. That avoids a new £480 phone purchase; it does not deliver the same new handset. Show any existing device balance separately so keeping or replacing the phone does not make an old debt disappear.

Choose one end date and write a column for each option. Add the following amounts, then compare both the total and the highest cash payment. Do not subtract possible resale or cashback as if it were guaranteed.

A 36-month device plan should not look cheaper merely because the table stops at month 24. Show the remaining twelve device payments alongside the first 24 months, or extend both alternatives to 36 months and include service for the whole period.

For an existing device debt, record what remains payable under each option and its timing. Include it once: either as settlement or scheduled repayments as required by the terms. Check both the airtime contract and the separate credit agreement before assuming switching is free.

Ofcom’s contract checklist explains the price information to check. Use the actual dates of contractual rises, not an assumption that every increase starts exactly twelve months after signup. A fixed device instalment does not necessarily make the airtime price fixed.

For finance, read the APR, total amount payable, payment term, missed-payment consequences and early-settlement conditions. Eligibility and credit checks depend on the offer; do not assume that SIM-only or a handset plan will be available to everyone. A rolling SIM may offer flexibility, but its future price is not guaranteed for the whole comparison.

Check employer or family discounts for ongoing eligibility, term, excluded tariffs and lost broadband bundle benefits. An included subscription saves money only if it replaces spending you would otherwise make. A trade-in depends on eligibility and device condition; show a no-trade-in case if the value is uncertain.

SIM-only will not save money if unsuitable coverage forces a second service, repair or replacement costs outweigh the difference, or a genuinely cheaper equivalent handset contract wins after all costs. Do not drain the rent or emergency reserve to obtain a lower lifetime phone price. Check the cash-flow plan as well as the total.

To keep one mobile number when changing providers, Ofcom explains the PAC process: text PAC to 65075 and give the code to the new provider. Review the exit information first. A number transfer does not erase a device loan; confirm what remains due under its terms.

Read cancellation and returns conditions, especially for a handset bought separately from service. Save the quotes and check the final old bill and first new bill. Keep account access until balances and any refunds are settled. This is general cost-comparison guidance, not a recommendation to borrow or choose a particular provider.

Use recent bills to choose a data allowance and check coverage where you use the phone. Collect one suitable SIM-only quote and, if you need a replacement phone, an equivalent handset-contract quote plus a separate phone price.

1. Keep your phone if it remains suitable: compare airtime costs and flexibility.
2. Need a phone? Compare the same model, storage and condition over the same dates.
3. Use the worksheet above to record the total payable, upfront cash and remaining device balance.
4. Check the final provider quote, coverage, eligibility and cancellation terms before ordering.

Compare a comparison-site result with the provider’s direct offer and any existing-customer price. Check which providers the comparison includes and whether a featured result is sponsored. Choose the suitable option with the best complete cost for your needs, including keeping your current arrangement when it wins.