I needed an e-sim, so I switched to this provider. The transition was easy, and I was aware that I would have no phone connection for a few hours. The only challenge was figuring out how to reset my account password, but they responded quickly with guidance.
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UNDO is Belgium’s first climate-neutral mobile operator.
We combine affordable mobile plans with real impact: CO₂ compensation, reforestation in Congo and Belgium, and Zero Waste on all our subscriptions.
With us, unused data, minutes and texts don’t disappear — they roll over to the next month.
No waste, no fine print — just honest mobile. Starting from €4/month.
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