I can't call you when the courier arrives, so what should they do?

Under normal circumstances, you will send a text message, or contact the delivery the next day. If you still can't get in touch the next day or the third day, contact the sender or return it if you don't pick it up in 3 or 7 days.

Extended data:

Express delivery, also known as express delivery, is a door-to-door logistics activity with postal function, that is, express delivery companies deliver customers' goods quickly through railway, highway and air transportation. In many ways, express delivery is superior to postal service.

The main domestic express delivery agencies are: Cross Express, SF Express, Postal Express, High Speed Rail Express, ZJS, ZTO Express, YTO Express, Shentong Express, Best Express, Dayun Express, Guo Tong Express, Tian Tian Express, Express Easy Express, Sure Express, Quanfeng Express, Unitop Express, Dayi Express, Fengda Express, Nengda Express, Debon Logistics, Su You Express and Jingdong Express.

References:

Baidu Encyclopedia = Express