@Toni ******
What are you trying to say? While each country is different, my point is for Cambodia, the e-visa (if you're using one) MUST be printed. They need one copy on arrival and a second one upon departure. Printing services are usually available at the border; sometimes you pay, sometimes it's free.
For Thailand, I can't advise specifically, as I have never held an e-visa. My DTV is a sticker.
However, several people have reported they were able to show their visas on their phone. I would advise against this, especially at airports, as this may cause airlines to assume you haven't got a visa and thus ask for an onward or return (round-trip) plane ticket to get on the aircraft.
At land borders, they may be more flexible, but at more remote land borders, Thai officials may also want you to have the e-visa printed.
Note that this contrasts with Japan - their e-visa system does not recognize printed copies of the e-visa. You must have an internet connection to show proof that the e-visa is in the system.