When Yolanda Nevarez visits Las Vegas, she walks right past the people lined up at the hotel check-in desk and heads straight to her room.

A regular at MGM Resorts properties, she uses her phone to pull up the M Life smartphone app, where she can check in remotely. A virtual room key is delivered to her phone, which she waves in front of a reader on the door to let herself in.

“The fact that your phone is your key, I love that,” said Nevarez, who is from San Antonio, Texas.

“When you’re going in and out of the room, you’re often in a hurry for whatever reason and a lot of people forget their key. My phone is always with me,” she said.