UNDO review: customer ratings and verdict in 2026

Q: What is UNDO's average rating?

UNDO has an average CallMePower rating of 4,2/5 based on 1 reviews.

UNDO review customer ratings and verdict in 2026

By Maaike Zahn | Last updated on 18 July 2026 | 4,2/5 (1 reviews)

On average, UNDO scores 4,2/5 based on 1 review on CallMePower. On this page we dive into the UNDO reviews, the UNDO customer service and the prices UNDO charges.

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UNDO customer experiences

Below you'll find reviews from customers who shared their experience with UNDO on CallMePower. Every review is verified before publication.

4,2 / 5

Based on 1 review

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CallMePower's review of UNDO

Below you'll find the pros and cons of UNDO according to the CallMePower telecom team.

Pros UNDO

Enige klimaatneutrale telecom provider in België.
Divers aanbod aan gsm-abonnementen.
Verschillende projecten voor derdewereldlanden en het milieu waar je aan bij kunt dragen.

Cons UNDO

Beperkte klantendienst.
Behoort niet tot de goedkoopste telecom providers.

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UNDO customer service review

De UNDO klantendienst is in onze ogen beperkt. Hoewel wij het zeer positief vinden dat je UNDO telefonisch en via de mail kunt contacteren, vinden wij het ontbreken van social mediakanalen en een online chat nadelig. Ook moet er vermeld worden dat het telefoonnummer van UNDO niet gratis te bellen is, want bij nadelig vinden.

UNDO reviews on other platforms

Customer reviews are an important indicator when choosing a telecom provider. Our review also takes UNDO ratings on other platforms, such as Trustpilot, into account.

4,2 / 5

Trustpilot

Good

586 reviews

These ratings reflect a wide range of experiences. Negative reviews often represent isolated cases rather than overall trends — always look at the full picture.

Becoming a UNDO customer

Convinced after reading this review and ready to subscribe to UNDO? Below you'll find how to subscribe to UNDO.

Website van UNDO

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Frequently asked questions about UNDO reviews

Click on the stars at the top of the page to write a review. Fill in your name, email address, a title and your experience (at least 50 characters). After submitting you'll receive a verification email. Once confirmed, your review is published.

Every review is verified via email confirmation. Only reviews from actual customers or former customers are published. This is how we keep ratings reliable and honest.

UNDO has an average CallMePower rating of 4,2/5 based on 1 reviews.

First contact the UNDO customer service team. If your complaint isn't resolved, file a complaint with the Telecommunications Ombudsman. Prefer to switch? Compare every Belgian operator first with our telecom comparator.

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How does UNDO stack up against other providers?

Before you commit, it's worth reading reviews of two or three alternatives. These are the providers most often compared with UNDO.