3play or 4play bundle: which to choose in Belgium?

3play or 4play bundle: the difference comes down to a single service, mobile. A 3play groups internet, TV and landline phone; the 4play adds the mobile. So the right choice rests on one question: does the 4play's mobile discount beat a separate MVNO plan? Often, no.

A 4play bundle is a single subscription that groups four services with the same operator: internet, television, landline phone and mobile. The 3play stops at three and leaves the phone out. The comparator Abonnement-Tv-Internet.be listed 207 active bundles on 16 June 2026, and most differ only by the mobile part. That is where your decision is made.

What is the difference between a 3play and a 4play bundle?

A 3play bundle groups three services: internet, TV and landline phone. The 4play adds the fourth, mobile. The only variable that changes from one plan to the other is the SIM card; the speed, the channels and the landline stay identical.

In practice, take a cable 3play at €45/month, add a mobile line with the same operator, and you get its 4play. The operator then applies a bundling discount on the mobile to keep you on all four services. The Scarlet Trio (internet + TV + landline) rose to €45/month on 1 January 2026, up from €42: that is a 3play, the mobile is billed on top.

The useful nuance: a 4play is not "a better bundle", it is a 3play with a negotiated mobile option. The question is whether that negotiation works in your favour.

Should you choose a 3play or a 4play bundle?

Take the 4play only if you have a real mobile use and the bundling discount drops below the price of a separate plan. Otherwise, a 3play paired with an MVNO SIM at €5/month is almost always cheaper, and easier to leave.

The 4play simplifies life: one bill, one contact, one global discount. The trap is paying for that convenience above its value. A historical operator often bills €15 to €20/month for the included mobile line, where an MVNO such as DIGI or hey!telecom offers a decent plan from €5/month on the same physical network.

For Laura, in Liège, who had paid for her bundle for four years without re-comparing, moving the mobile out of the 4play for an MVNO SIM was enough to recover about ten euros a month, without changing her internet or TV.

When is a 4play really worth it?

A 4play is worth it when the included mobile line costs less, discount included, than an equivalent plan bought elsewhere, and when you actually use that line. Below that, you pay for a service you could have for less.

Do the maths over 24 months, not over the first bill. In June 2026, Proximus showed a €35/month discount for the first six months on its Flex+ internet + mobile + TV bundle, which then restarts around €45.99/month. The discount inflates the offer at the start, then the bill jumps at once. Add annual indexation: according to Test-Achats, VOO raised 22 of its bundles by €3/month on 1 January 2026, after €2 already in July 2025.

Is the mobile in a 4play cheaper than a separate plan?

Not always. The included line gets a bundling discount, but starts from a high rate. A Proximus or Orange plan around €15/month, discounted to €10 inside the bundle, still costs more than an MVNO at €5/month on the same network. Compare the price after the discount, not the headline discount.

Can you add several SIM cards to a 4play bundle?

Yes. Orange's Love or Telenet's One plans let you add extra mobile lines at a reduced rate. For a household with three or four phones, this is where the 4play becomes genuinely competitive, because the discount stacks per line.

Does a 4play bundle always include 5G?

No. 5G depends on the mobile plan chosen inside the bundle, not the bundle itself. Entry-level lines often stay on 4G; 5G comes with the higher mobile plans. Check the included plan's sheet before signing.

3play + MVNO SIM: the alternative that often beats the 4play

Keeping internet and TV with the cable operator that serves your address well, then taking mobile from a no-commitment MVNO, frequently costs less than an all-in 4play. You lose the small bundling discount, but you gain freedom and pay each service at its fair price.

Decoupling has another upside: your services do not fall together. A price hike, an outage or a dispute on the mobile does not touch your internet. And when it is time to renegotiate, you are not tied to a single supplier. Conversely, the 4play still makes sense if you want one bill and you use all four parts to the full.

Does a 4play make switching operator harder?

Yes, mechanically. With a 4play, switching operator means moving four services at once: internet, TV, landline and mobile. The more you concentrate, the heavier the switch, and the more an operator knows you will struggle to leave.

The law still protects you. The switch goes through Easy Switch, the system supervised by the IBPT (Belgian telecom regulator). You give your numbers and your Easy Switch code to the new operator, which cancels the old contract and coordinates the switch to limit the outage. You keep your mobile and landline numbers. If it runs late beyond one working day, the IBPT provides for compensation of €3 per day.

One detail that counts: with a 3play paired with an MVNO, you can change the mobile alone, in a few minutes, without touching internet. Decoupling is also room to manoeuvre.

To go further, first check which internet, TV and mobile bundle fits your profile, confirm the technology available at your place with our guide on cable or VDSL, why the address changes everything, then compare the cheapest mobile plan to decouple the fourth part via our mobile operator comparison. In short: count the mobile separately before signing a 4play.