Last updated: August 2026
Most of the ways a cheap contract turns expensive are predictable. Nearly all of them come from comparing the monthly figure instead of the total.
1. Judging by the monthly instalment
The most common error, and the one that causes the others. Providers lower a monthly figure in two ways: a cheaper handset, which genuinely saves money, or a longer term, which does not.
Multiply the instalment by the number of months and add every once-off fee. Compare that. See 24 vs 36 month phone contract.
2. Ignoring the software support window
The specification that decides whether a cheap phone is still usable at month twenty-four, and the one least often advertised. Entry-level handsets have the shortest windows.
A 36-month contract on a budget phone can end with you paying for a device that stopped receiving security patches months earlier. Ask for the commitment before signing.
3. Underestimating out-of-bundle rates
Small bundles run out. Out-of-bundle rates are considerably higher than in-bundle, so a cheap plan plus regular overage frequently costs more than the larger plan would have.
Ask what the rate is and whether spending can be capped. See how much data do I need.
4. Choosing a network on price alone
A cheap contract on a network with poor coverage where you live is not cheap. Check coverage first, then compare price among the providers that actually work for you.
See check coverage before a phone contract.
5. Taking a handset contract when SIM-only would do
If your current phone works and still receives updates, a handset contract is the wrong product. SIM-only costs a fraction because nothing is being financed.
This is the single largest saving available to most people, and it is routinely skipped. See SIM only vs phone contract.
6. Letting the contract roll over
Many agreements continue at the same rate after the term ends — meaning you keep paying device financing on a phone you already own.
Diarise the end date. It is the cheapest habit on this page.
7. Buying a bundle you did not need
A second device is not a saving if you would not otherwise have bought it. Bundles work when both devices are genuinely needed and the second is much cheaper than the first.
See are 2 for 1 phone deals worth it.
8. Stretching affordability
A contract you can only afford in a good month is one you will struggle with across two years. Missed payments create adverse credit listings that outlast the handset by years.
See how much phone contract can I afford.
Compare on cheapest cellphone contracts, budget deals and best contract deals South Africa.
Frequently asked questions
What is the most common mistake?
Comparing monthly figures rather than the total across the term.
Why does the support window matter on a cheap phone?
Budget handsets have the shortest windows, so a long contract can outlast the phone’s security updates.
How do I avoid out-of-bundle charges?
Size the bundle on actual usage, and ask whether spending can be capped.
What saves the most money?
Taking SIM-only if your current phone still works.
More comparisons
These pages cover closely related options worth comparing alongside this one.
- No Upfront Payment Phone Contracts
- How To Choose An Affordable Phone Contract
- Cellphone Contract Guides
- Best Phone Contract For A Family
- Cheap Telkom Contract Deals
- Cell C Contract Deals
- Check Coverage Before An Internet Deal
- Bank Account And Debit Order For A Phone Contract
- Contract Deals
Pricing, terms and approval criteria are set by each provider and change regularly.