What can I do with extra sim cards? Do you have many spare sim cards and you don't know what to do with it, or you want to throw it away, we have got a solution for you. We can show you what to do with extra sim cards. The sim card can be MTN, ORANGE, NEXTTEL, or any other network. It all works. Earn credit with spare sim cards. I can teach you how to earn credit with the extra sim cards that you have, regardless of the network. Instead of throwing away the sim cards, learn these procedures which you can use to get free credit to your mobile number. By free credit I mean mobile top up. Requirements to get free credit with your extra spare sim cards. To use your spare sim cards to get credit, you will need the following. The spare or useless or extra sim cards. As many spare sim cards as possible. android phones. So that you can download the app to use spare Sims cards and get free credit Internet connection. Used to download the app to get free cred