Reference date: 4 August 2026. The prices below come from our daily price monitoring of all 12 SIM only providers in the Welcompare comparison. We look not only at the promotional price, but also at what you pay on average over the full contract period. We calculate that average for every offer and show it in the comparison. That way you avoid "€1 per month" teasers where you pay full price after a short promotional period.
There is no single best SIM only. It depends on how you use your phone. That is why we pick winners by use case, based on measurable data. At the top: the deal that combines everything.
🏆 Best deal of the month: 50+ mobiel, every 2-year bundle €2.50 per month
The strongest deal of August comes from 50+ mobiel: choose a 2-year subscription and every bundle costs €2.50 per month for the first 12 months, from 10,000 up to 75,000 MB, always with unlimited calls and texts. You are on Vodafone's 5G network with speeds up to 200 Mb/s and Dutch customer service. On the fairest measure, the average price over the full contract period, it also wins: on average €5.00 to €8.25 per month for bundles that cost a multiple elsewhere. Prefer a 1-year term? Then you pay a fixed price without promo tricks: from €8.50 (10,000 MB) to €15.00 (75,000 MB) per month. Nowhere else do you get 75,000 MB with unlimited calling for this money. Not for nothing is 50+ mobiel one of the fastest-growing providers in the Netherlands right now. See the 50+ mobiel overview.
Never think about your bundle again: unlimited, but mind the speed
With unlimited data it is not just the price that counts, but above all the speed. Unlimited users stream, video call and hotspot a lot.
- Cheapest unlimited: Budget Mobiel, €10.00 per month (promotional price with a 2-year subscription; €24.00 without the promotion), with a maximum speed of 25 Mbit/s. Fine for e-mail, apps, music and standard video. Not the choice for heavy streaming, large downloads or hotspot use.
- Unlimited data at full speed: Vodafone, from €26.00 per month, with speeds up to 1 Gbit/s. Note: that price includes 150 calling minutes. If you also want unlimited calling, KPN is the cheapest at €28.00 per month; at Vodafone it starts at €31.00.
Choose price and know what speed you give up. Choose speed and Vodafone is this month's cheapest. See Budget Mobiel and Vodafone.
Best rated by customers: 50+ mobiel
Price is not everything. Looking at what customers themselves say, the picture is clear: 50+ mobiel scores 4.5 stars on Trustpilot, based on more than 48,500 verified reviews. That is both the highest score and by far the largest number of reviews of all SIM only providers in our overview; by comparison Simyo, named best provider by the Dutch Consumers' Association panel, sits at 3.9 stars on Trustpilot with over 7,300 reviews. Our in-house telecom experts rate 50+ mobiel 4.3 in our comparison, based on ordering process, network and customer service. See the 50+ mobiel overview.
Everything from the largest network itself: KPN
If you want to be with the network owner directly, with 5G priority, speeds up to 1 Gbit/s on top bundles and the most extensive service options, you pay a premium. KPN holds the highest expert score in our comparison at 4.7. Current KPN bundles and prices are in the KPN overview.
Also sharp this month
Youfone offers 40,000 or 50,000 MB for €5.00 per month for the first 12 months of a 2-year contract (300 minutes; unlimited calling for €1 extra). Check the comparison for the average price over the full term before you decide. Simpel sits between €3.50 and €5.00 (up to 60,000 MB), and Lebara starts at €3.30 for 40,000 MB on the KPN network. All current promotions with average prices are in the comparison.
How we pick the winners
Welcompare is an independent comparison site and monitors the prices and promotions of all 12 Dutch SIM only providers daily. The Best deal of the month is the strongest combination of promotional price, average price over the full term, bundle contents (data and minutes) and how long the price is fixed. For unlimited subscriptions we weigh the maximum internet speed. Quality and service are assessed with our own rating system: a score per offer from our in-house telecom experts (ordering process, network reliability, customer service), combined with Trustpilot scores as a market trust signal. This page is refreshed monthly; the comparison overview is always up to date. Want to know exactly how our comparison works? Read how Welcompare finds the best SIM only deal for you.
Frequently asked questions
What is the best SIM only deal of August 2026?
50+ mobiel: with a 2-year subscription every bundle up to 75,000 MB with unlimited calls and texts costs €2.50 per month for the first 12 months, averaging €5.00 to €8.25 over the full contract period (reference date 4 August 2026).
Where do I get the most data for my money?
At 50+ mobiel: 75,000 MB with unlimited calling for €2.50 per month in the first year of a 2-year subscription, on 5G.
What does unlimited data cost per month?
From €10.00 at Budget Mobiel as a promotional price with a 2-year subscription (note: capped at 25 Mbit/s). Unlimited data at full speed starts at €26.00 (Vodafone, with 150 calling minutes, up to 1 Gbit/s); unlimited data and calling from €28.00 (KPN).
Which SIM only provider has the best service?
Measured by customer verdict, 50+ mobiel is the best-rated provider: 4.5 stars on Trustpilot across more than 48,500 verified reviews, plus a 4.3 from our in-house telecom experts. The highest expert score in our comparison goes to KPN (4.7).