The bank account of the German telecommunication provider is free and especially useful if you already have an o2 mobile phone contract. For every Euro you spend with your Mastercard, you instantly receive free mobile data as a bonus (alternatively you can get Amazon vouchers).
free in EU / 1.75% in the rest of the world
€0 / year
8.99% to 13.9%
If you want to benefit from the mobile data bonus you could get with this o2 bank account, have a look at My German Phone’s overview of o2 SIM cards.