What if i can't print my concert tickets?

I'm not able to print concert tickets for warp tour, but i have the file on my iphone, it clearly shows my tickets and the barcode, will i be able to let them scan that/would they?

The phone should be enough but they should have a place that tells you about these things just to make sure.

Yeah I think I went to a All Time Low and Pierce The Veil concert and people were showing them there phones instead of printing their tickets. I'm not TOTALLY sure but it will probably work at warped.

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