Overview
- These offers bolt a repeatable data add-on onto a standard high‑speed bundle, letting customers restore full speed whenever the cap is hit.
- The option typically adds €5–€20 per month versus comparable plans, so it only pays off if customers actually use the add-ons.
- Top-ups are usually limited to 1 GB steps, which can be consumed in roughly 20–30 minutes of HD video streaming, causing frequent interruptions for intensive use.
- They are not a practical substitute for true unlimited plans that run about €25–€85 per month, according to the comparison site.
- Verivox advises choosing a well‑sized Allnet plan based on actual usage, noting average mobile data use in Germany is about 12 GB per month and that occasional one‑off top-ups on regular tariffs can become very costly.