It is not recommended that you activate the pass before the day when you start your travel. You can make a test activation, but then you should deactivate the pass again.

If you activate the pass in advance, you can't deactivate after 00.00 on the day when the validity of the pass starts. If something unexpected happens to you, or if there is a train strike or accident, or anything else that prevents you from travelling, you will have an active pass that you can't deactivate. 

Thanks for replying my question Anna.

But how do i get my journey activates so the conductor sees the barcode?

With kind regards

Ton from the Netherlands

Hi @Ton Soppe. Here is a link with a video that shows you step by step how to activate Pass, and generate and show you QR code: https://www.interrail.eu/en/interrail-passes/interrail-mobile-pass/getting-started