Phone trade-in at Proximus and Orange: the balance stays

No, trading in your old phone does not lower what you still owe on the financed handset. Proximus pays with a voucher or a bank transfer, and so does Orange Belgium. The amortisation schedule does not move by a single cent. Recorded on 30 September 2026.

Where does trade-in money go at Proximus and Orange?

Into your bank account, or into a voucher. Never onto the « handset » line of the bill.

The Proximus trade-in page sets out two regimes. A device worth €20 or less earns a €20 Proximus voucher, handed over on the spot. Above that, CTDI, the logistics partner, assesses the device, sends a final proposal by e-mail and transfers the amount « in the days that follow ». The service is open to non-customers, five devices a month at most.

The Orange Belgium page follows the same logic under other names. In store, the value is paid as a shop voucher, with €20 on top. Online, CompaRecycle assesses the device once received and pays by bank transfer. Advertised ceiling: €500, depending on brand and model.

At Telenet and BASE, I found no public trade-in page on 30 September. The cells stay empty in the table, and I do not fill them in by guesswork.

The case that surfaced at Test-Achats says a lot: in December 2025 a customer left a Proximus shop with four €20 vouchers for four old phones, when she had expected a bank transfer. Both regimes exist, and it is the estimated value that decides which one applies.

Does a trade-in lower the financed handset balance?

No. And I have to correct a sentence I wrote on this very site.

In August, in the article on the €1 phone and its 24-month credit, I advised applying the trade-in to the financed principal. On the pages recorded on 30 September 2026, no Belgian operator offers that. The trade-in pays you; it repays nothing on your behalf.

Take the site's reference device: €599, a €1 deposit, €598 financed linearly over 24 months, or €24.92 a month. At month twelve, the amortisation schedule shows a €299 balance. Trade in your old phone for €150 that day: you receive €150, and you still owe €299. Leave the operator the following month, and €274.08 falls due in one go.

Three lines do not move when you trade in a device:

• the amortisation schedule balance, month by month;
• the handset instalment, billed separately from the plan;
• the date from which the plan can be cancelled without penalty, set by the six-month rule.

Can you put the trade-in transfer towards the balance, through early repayment? Perhaps. Neither Proximus nor Orange Belgium publishes the answer. Ask in writing, and keep the reply.

Six steps to trade in a phone without a nasty surprise

1. Read the balance of the device you are replacing, in the amortisation schedule annexed to the contract. It is the one figure the trade-in will not change.
2. Have the device estimated on two channels, for instance Proximus and Orange, and take a dated screenshot of each estimate, including the declared condition.
3. Declare the condition without dressing it up: scratches, battery, casing, screen. The estimate is a ceiling; the final offer is calculated on the device received.
4. Back up, then remove your Apple or Google accounts and reset the device. Proximus requires it before drop-off. Remove the SIM card and the memory card: under Samsung's 2025 terms, they are destroyed on receipt.
5. Choose the bank transfer over the voucher if you are not certain to buy again from the same operator. A voucher ties you to a shop; a transfer, to nothing.
6. Keep proof of drop-off, IMEI included, until the transfer arrives. Before sending, ask whether a revised final offer can be refused and the device returned, and at what cost: the pages read do not say.

Why does the estimate drop on arrival?

Because it commits nobody.

On the Proximus forum, a customer described on 27 August 2026 buying a Galaxy Z Fold 8 with a trade-in estimated at €505, that is €405 plus a €100 bonus. At assessment, the offer fell to €312. Gap: €193. The moderator's reply held one useful line: Samsung announces its trade-ins « up to » a maximum amount, and Proximus has no say over the manufacturer's assessment. A second customer, in the same thread, cites a Fold 6 estimated at €263 and taken back for €53.

I saw the same scene at the counter in Namur for seven years: the customer remembers the figure on the poster, the contract only promises the ceiling.

Is Orange's Return Guarantee worth its €5 a month?

It pays off mostly if you change phone at month twelve, not a day later.

Orange Belgium's Return Guarantee costs €5 a month. It guarantees 60% of the device's initial value for the first twelve months, 50% from month thirteen to month twenty-four, as a discount on a new smartphone bought at Orange. The page recorded on 30 September 2026 lists the iPhone 15 range as eligible models and reserves it for customers on an Orange mobile plan: on the site's price list recorded on 24 August 2026, Orange unlimited is €40 a month, post-promotion price not published. I apply the percentages to the €599 reference device, so the figures read alongside the balance.

At month twelve, the net guarantee covers the balance to within 40 cents. One month later, it loses €59.90 at a stroke, while the balance has only fallen by €24.92. If you take the option, put the month-twelve date in your diary. And bear in mind that the discount only applies at Orange: it brings you back to the same counter, for a new device and, in practice, a new amortisation schedule.

The trade-in bonus often comes from the manufacturer, not the operator

The « + €100 on trade-in » shown next to a new smartphone is often a manufacturer campaign. Under the terms of the Samsung campaign run with Proximus from 12 May to 1 June 2025, Samsung registered the claim, assessed the device and transferred the amount, within seven weeks. In a dispute, the manufacturer is therefore the one to write to, invoice and IMEI in hand.

Is selling it yourself more profitable?

Sometimes, and I am not going to put a figure on a second-hand price I have not recorded. A private sale pays you without an estimate ceiling, but takes time and a handover in person. The financed handset balance stays identical either way.

The rule that keeps the balance payable is federal: it applies the same way in Wallonia, Brussels and Flanders. The FPS Economy points out that a device received with the subscription stays due at its residual value, and the Telecommunications Ombudsman Service handles billing disputes with an operator free of charge.

Sources

• Proximus, « Échangez votre GSM » page, trade-in regimes, role of CTDI and drop-off conditions, consulted on 30 September 2026.
• Orange Belgium, « Reprise ancien GSM » page and « Return Guarantee » page, consulted on 30 September 2026.
• Samsung Belgium, specific terms of the trade-in campaign run with Proximus from 12 May to 1 June 2025.
• Proximus forum, thread « Offre de reprise mensongère », 27 August 2026; Test-Achats, public complaint about Proximus trade-in advertising, December 2025.
• FPS Economy, ConsumerConnect, cancelling a telecoms contract and residual value of the handset, consulted on 30 September 2026.
• The site's price list, recorded on 24 August 2026; amortisation schedule for a €599 device, €1 deposit, €598 financed linearly over 24 months. Post-promotion prices are not published and have not been estimated.