How do I switch to the Only Data rate plan?
You can easily switch to the Only Data rate plan via My Viking. Just follow the steps mentioned there and you’re good to go. You can choose to switch immediately, when your bundles expire, or (if you have a prepaid SIM card) when your calling credit drops to € 2.50 or lower.
If you want to switch to the Only Data rate plan, you don’t need a new SIM card if you have a regular one already.