o2: Activate SIM card online - how it works

This practical tip explains how to activate an o2 SIM card online.

Activate the SIM card from o2 online

1. First open the o2 website.
2. Depending on which SIM card you want to activate, you must now click on one of the categories: You can activate a new contract, register a swapped or additional SIM, or activate a prepaid SIM.
3. Afterwards, enter the SIM card number and the date of birth of the contractor for a new contract and click on the "Activate now" button.
4. For the other categories, follow the instructions on the screen to activate your card.