Unlimited mobile plans in Belgium: the 300 GB rule

Five Belgian mobile plans are entitled to use the word « unlimited » in the regulator's sense, and three of them run on the same network. The cheapest asks €25 a month, the dearest €41, for a strictly identical signal. The rest of the market sells very large volumes under a name that is not theirs to use.

The word « unlimited » has been regulated since February 2022

It is not free to use. In Belgium an operator may sell a mobile plan as « unlimited » in two situations only: either the speed is never reduced and access never suspended, whatever the volume; or throttling does not start before 300 GB consumed within the month. That is what the IBPT/BIPT communication of 21 February 2022 on guidelines for « unlimited » internet offers sets out, having given operators six months to comply. The IBPT, or BIPT in Dutch, is the federal telecoms regulator, and its guidelines bind every operator selling in Belgium.

The threshold depends on the service. For fixed broadband the regulator uses 3 TB; for mobile, 300 GB. And the first condition, genuine absence of any cap, is met by nobody on the Belgian market: every so-called unlimited plan falls under the second.

What happens past the threshold also has a figure, and it is the same from one operator to the next: 512 kbit/s, half a megabit per second, until the end of the billing month. The meter does not stop. It closes, which amounts to much the same thing as soon as you want to watch a video, and video is precisely the usage that takes a subscriber past 300 GB.

The regulator paired its rule with a transparency duty: operators must state clearly, and accessibly, what exceeding the threshold means in practice for the end user. If you believe an advertisement uses the word wrongly, two routes exist, the IBPT/BIPT for the telecoms sector and the FPS Economy for misleading commercial practices.

How many unlimited plans actually exist in Belgium?

Five. The table below lists them in order of the prices recorded on 29 August 2026, with the column Belgian comparison sites never show: the network that actually carries the signal.

Three networks share those five rows. Telenet carries three of them, under three different labels: TADAAM, its no-contract online subsidiary; BASE, its historic consumer brand; and Telenet itself. Orange carries one, VOO, whose mobile business moved onto Orange masts after Orange Belgium acquired 75 % of the company. Proximus carries one, its own.

Three unlimited offers, one network, €16 apart

Here is the figure this article was written for.

TADAAM at €25, BASE at €39, Telenet at €41: three labels stuck on the masts of a single operator, with the same full-speed volume and the same throttling afterwards. Between the first and the third, €16 a month, or €192 over twelve months, with not one megabit of network difference to justify it.

What those €192 buy deserves naming rather than guessing. At Telenet and BASE, a customer service with actual shops, bundle options combining mobile with fixed internet and television, extras such as rolling unused data into the following month. At TADAAM, online sign-up, no shop, no bundle, and a deliberately stripped-down brand. Three defensible things. None of them is signal.

Three networks, fifteen labels: on Belgian unlimited plans, the price gap sits between two brands of one group, not between two masts.

The reasoning also runs the other way, and that is where the table earns its keep. If Telenet's network reaches your address poorly, TADAAM's €25 is not a bargain, it is a cheap mistake. Coverage is checked before price, never after, and we have set out elsewhere how to read the regulator's atlas municipality by municipality rather than a brand's commercial map.

Why do two Belgian comparison sites not count the same offers?

Because they are not measuring the same thing, and sometimes because they contradict themselves from one page to the next.

Mobile Vikings Unlimited illustrates it well. Comparing pages published this summer by two of the most visible Belgian comparison sites on this subject gives four different volumes for a plan bearing the same name.

The first three rows come from the same publisher, with the same update date. The fourth comes from a competitor that explicitly excludes Mobile Vikings from the unlimited list on the grounds that 170 GB is not 300. The two sites also diverge on Orange: one files Mobile Unlimited among the 300 GB offers, the other leaves it out of its list of five.

We do not settle it on their behalf, and we have subscribed to none of these plans to go and look. The only solid conclusion is this: on a market where « unlimited » has a precise regulatory definition, the pages that serve as reference material for search engines agree neither on volumes nor on which offers qualify. Before repeating a figure you read somewhere, ask for the official price sheet and read the fair-use line.

Mobile Vikings changed network, the tables did not follow

One detail stopped us while building the previous table, and it reaches well beyond unlimited plans.

Mobile Vikings has belonged to Proximus since its takeover in the early 2020s, and the brand migrated its SIM cards onto its parent company's network. The brand-to-network mappings still circulating on Belgian sites, including on our own pages published in July, often place it on Orange's network, which was true before the deal. On a market where fifteen brands rent three networks, one acquisition is enough to make an entire table obsolete without anyone noticing.

The practical consequence fits in a sentence. If you pick a brand because it works well at your neighbour's place, check that the mapping you are relying on postdates the last takeover, otherwise you are testing the coverage of a network you will not get.

The thirteenth month, and sometimes the seventh

The prices in the table are full prices. That is deliberate, and it is the only honest way to compare offers whose promotions do not last the same length of time.

Two examples recorded on 29 August 2026, on price lists where the promotion was clearly flagged. Proximus Mobile Unlimited showed €34.99 a month, but for six months only: from the seventh, the price becomes €49.99, €15 more, a year and a half before a standard twenty-four-month contract ends. Orange Mobile Unlimited showed €31 for twelve months against €40 afterwards. At yoin, the 150 GB plan started at €4 in the first month and rose to €25, a ratio of one to six.

None of these promotions is a trap in itself, and all are disclosed. The trap is comparing a six-month introductory price with a full price, which any table sorted by displayed tariff does automatically. Over a two-year commitment, the price that counts is the one in month thirteen, or month seven when the promotion is short.

Seven checks before signing an unlimited contract

None costs money, and each has already made somebody walk away.

• The host network, before the price. Ask which masts the SIM uses and check coverage at your exact address, not across your municipality.
• The full-speed volume, in figures. A plan under 300 GB is not unlimited in the regulator's sense, whatever its commercial name.
• The speed after the threshold. 512 kbit/s is the market norm; have it confirmed in writing rather than on a sales page.
• The exact length of the promotion. Six months, twelve months, or none: the price that follows decides the real two-year cost.
• The allowance usable inside the European Union. It is always capped, even on a Belgian unlimited plan, and it is deducted from your national volume.
• Out-of-bundle charging past the threshold. Some plans slow you down, others bill per gigabyte; the gap between those two mechanisms runs into tens of euros.
• Your actual consumption over the last three months. It sits in your customer account, and it is the only figure that concerns you.

Do you really need 300 GB a month?

For the great majority of Belgian subscribers, no.

Three hundred gigabytes is a volume you do not exhaust by accident. It takes mobile-only usage to get close: daily tethering to a laptop, high-definition video off Wi-Fi every day, working from home with no fixed line. As soon as a home has Wi-Fi and an office has it too, monthly smartphone consumption usually stays under 50 GB.

The trade-off is easy to price. A 25 to 40 GB plan costs between €5 and €7 a month at several Belgian brands, against €25 for the cheapest unlimited. Over twelve months the gap passes €200 for a volume most subscribers will never reach. Unlimited earns its place when the phone replaces a fixed connection, and in that specific case a 5G router at home deserves a look first, since its prices start considerably lower.

That leaves the case where unlimited needs no defending: usage genuinely above 300 GB, a well-covered address, and no wish to watch a meter ever again. The question then becomes simple, and it is the one we opened with: which brand is cheapest on the network that reaches you.

No tests, no measurements: price lists

We have subscribed to none of these plans and measured nothing in the field. This article aligns public price lists, a regulator communication and the pages of two Belgian comparison sites, recorded on 29 August 2026. Prices move, promotions end, and a takeover can shift a brand from one network to another within months.

The advertised price, the length of its promotion and the network carrying it: those three columns together are enough to decide, and that is exactly how our 5G plans ranking is built, host network shown next to every tariff. The comparison table lets you sort them row by row. On the large-volume bracket specifically, we looked elsewhere at Mobile Vikings unlimited at €25, whose name promises more than the price sheet delivers.

Sources: IBPT/BIPT, communication of 21 February 2022 on guidelines for « unlimited » internet offers (300 GB threshold for mobile and 3 TB for fixed, transparency duty on exceeding it); IBPT/BIPT, consumer section; FPS Economy, consumer protection (misleading commercial practices); Selectra Belgium, "Internet mobile illimité en Belgique : le comparatif 2026", updated 28 August 2026 (list of the five plans clearing the threshold, tariffs TADAAM €25, BASE €39, VOO €39, Telenet €41, Proximus €49.99, volumes Mobile Vikings 170 GB, hey! 160 GB, yoin 150 GB); Mon-Abonnement-Gsm.be, "abonnement data illimité" and "comparatif data illimitée" pages, updated 22 July 2026 (512 kbit/s throttling, six-month Proximus and twelve-month Orange promotions); Orange Belgium, press release on the acquisition of 75 % of VOO and the transfer of its mobile business; figures recorded on 29 August 2026. Official pages of the brands cited: TADAAM and BASE. No link on this page is monetised.