Do not let an upgrade message make four decisions for you. Decide separately whether to replace the phone, keep the network, keep postpaid billing and accept another fixed term.
The question
“My cellphone contract is ending. Should I upgrade, move to SIM-only or prepaid, or switch networks?”
Answer first
If your phone still works, first compare the cost of keeping it on SIM-only or prepaid against the full cost of another device contract. An expired consumer contract generally moves month-to-month unless you cancel or expressly renew, so you do not have to decide at the first upgrade message. Check the post-expiry price, audit your real usage, test alternative coverage and protect your number before changing anything.
Networks may make an early-upgrade offer before the original term ends. Accepting can start a new commitment or leave a residual device amount payable. Ask for the current contract end date, the new agreement start date and every overlapping payment in writing.
Compare them against the same usage and the same future time period.
| Option | Best fit | Main advantage | Check before choosing |
|---|---|---|---|
| Stay month-to-month | Buying time while you compare, or keeping a plan that still offers fair value. | No immediate new fixed term and no rushed device decision. | Promotional data or discounts may expire. Check the first bill after maturity and the notice needed to leave. |
| Upgrade with a device | A phone that genuinely needs replacement and a predictable monthly payment. | Spreads the device and service cost and normally keeps the existing number. | Creates a new term. Compare the total over 24 or 36 months, not the headline monthly amount. |
| Move to SIM-only | A phone that still works and a user who wants a monthly allocation without financing another device. | Separates service from the phone and can offer month-to-month flexibility. | Check whether the quoted plan is truly month-to-month, what happens to promotions, and whether fees apply. |
| Move to prepaid | Strict spend control, variable usage, or access to prepaid and personalised offers. | No recurring postpaid bill and freedom to change bundles. | You fund the phone separately, must manage bundle expiry, and may lose contract-only benefits. |
| Switch network | Poor coverage, poor service, or a demonstrably better total offer elsewhere. | Lets you choose coverage and value afresh while keeping your number through porting. | Test coverage first, start the port with the new network before disconnection, and settle the old account. |
Section 14 of the Consumer Protection Act says an individual consumer’s fixed-term agreement generally continues month-to-month at expiry unless the consumer directs termination or expressly agrees to another fixed term.
Doing nothing avoids an instant renewal, but it does not freeze the old promotion. Read the expiry notice and check whether the price, data, minutes or discounts change.
The Act requires an expiry notice 40 to 80 business days before the fixed-term end date. Use that period to collect written quotes, test another SIM and decide what should happen to the number.
If no notice arrived, ask the provider for the end date, post-expiry price and available options rather than accepting the first sales offer.
Device-contract total = once-off costs + (monthly payment × term) + required add-ons
Keep-phone total = repair cost + service cost over the same term
Switch total = new service cost + once-off costs + old-account settlement
Use 24 months for a 24-month quote and 36 months for a 36-month quote. Add insurance only if you would genuinely buy it, and do not count a trade-in value until it is confirmed in writing.
A battery replacement, screen repair or storage clean-up can be much cheaper than restarting device finance. Check whether the phone still receives security updates and supports the network features you use.
If the phone is safe and reliable, keeping it makes SIM-only, prepaid and switching offers directly comparable. Replace it for a real need, not because the account became “upgrade eligible”.
Start date, fixed-term length, total number of payments and notice period.
Exact model, storage, cash price, ownership date and any residual old-device amount.
Anytime data, night data, minutes, SMS, validity, rollover and out-of-bundle rules.
Monthly amount, once-off fees, pro-rata bill, annual increases and what happens after promotions.
Insurance, subscriptions, accessories, trade-in conditions and whether each is optional.
Early-cancellation method, device settlement basis, number-porting sequence and final-bill timing.
If a consultant will not provide the complete quotation and terms in a form you can keep, do not accept during the call.
These are starting points, not universal promises. Confirm the rules for your exact plan before acting.
Vodacom says an expired contract moves to month-to-month. Its published terms currently describe upgrade eligibility in month 22 of a 24-month contract and month 34 of a 36-month contract. Eligibility is not an instruction to renew, and plan discounts may fall away after the agreed term.
MTN’s published early-upgrade terms currently place standard 24-month early upgrades from month 21 and 36-month upgrades from month 32. An early upgrade can leave the remaining device value payable. MTN also publishes one-month plan rules for eligible early-upgrade or out-of-contract customers.
Telkom’s published FlexOn and Infinite terms say a matured mobile contract continues month-to-month until renewal, migration, conversion or termination. They also warn that promotional data, minutes or discounts can expire and the standard SIM-only rate may then apply.
Cell C’s upgrade FAQ currently describes month 21 as the renewal window for a 24-month contract. It also warns that an immediate upgrade can forfeit unused airtime, minutes, SMS and data, so confirm the effective date before accepting.
Please confirm my fixed-term end date, upgrade date, current device balance and price after expiry. Please provide written quotations for:
1. continuing month-to-month;
2. a comparable SIM-only plan;
3. migration to prepaid; and
4. the proposed device upgrade.
For each, show the start date, term, monthly price, once-off fees, inclusive value, promotion end dates and total payable over the full term.
If the current phone works, spend one billing cycle comparing SIM-only and prepaid while month-to-month—after checking the new price. If the phone must be replaced, compare a cash or separate-device purchase plus service against the device contract’s full-term total.
Switch networks only after testing coverage, and start the number port before closing the old service.
Use the full-term calculator and written-offer checklist before accepting.
Use the detailed notice, settlement and complaint workflow if you decide to leave.
Compare service without financing another phone.
Compare flexibility, billing and device trade-offs.
Check network pages and coverage before switching.
For an individual consumer, a fixed-term agreement generally continues month-to-month at expiry, subject to material changes disclosed in the expiry notice, unless the consumer directs termination or expressly agrees to another fixed term. Check the provider’s notice and the first bill after expiry because discounts or promotional allocations may change.
No. Upgrade eligibility is an offer window, not an obligation. You can compare continuing month-to-month, SIM-only, prepaid, a device upgrade and another network before accepting a new fixed term.
Treat it as financed or bundled value, not as free. Ask for the cash device price, service-only price, once-off fees and total payable over the full term so you can see what the phone and service really cost together.
The Consumer Protection Act regulations set 24 months as the general maximum for a fixed-term consumer agreement unless a longer period is expressly agreed and the supplier can show a demonstrable financial benefit, or another permitted exception applies. Ask for that benefit in writing and compare the full 36-month total.
Mobile number portability allows this, but sequence matters. Start the port request with the new provider while the old number is still active. ICASA warns that terminating first can make the number unavailable for porting. Porting the service does not erase valid device, usage or settlement amounts on the old account.
Prepaid suits users who want strict control and can actively manage bundles. SIM-only suits users who want a recurring allocation and itemised bill without financing another phone. Compare the same data, voice, validity, out-of-bundle rules and time period.
Usually, yes, once the fixed term has expired. Verify the new monthly price, lost promotions, notice requirement and any separate device balance. Month-to-month is useful as a short comparison window, but an unnoticed price change can make waiting expensive.
Reviewed by Riccardo Vallaro, Telecom & Mobile Services Specialist
Last reviewed: 19 July 2026
Sources we check: Section 14 of the Consumer Protection Act and regulation 5, ICASA mobile number portability guidance, and official Vodacom, MTN, Telkom and Cell C contract, upgrade and month-to-month information.
Why trust this: Guides are based on public operator pricing, USSD flows, official support pages, and South African prepaid user needs.
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