If you don't have the ticket, but you have the information it's possible to go through but you have to consult with the people in charge of the event to find out for sure.
Barcode, and there is no problem with cell signal there
Either one. The venues now have upgraded systems to accommodate those that don't have any access to the printing capabilities. Or vice versa.
No you can use barcode printing out is safe too
Thanks! Your answer is awaiting moderation.