What does Enrique have to do in order to contact his mother?

He tries to make enough money to by phone cards. This proves too difficult so Enrique visits Padre Leo, a local priest. He allows the migrants to use the church phone, which Enrique does to call his old boss, who eventually connects him with his relatives, who in turn give him Lourdes's (Enrique's mother) phone number. He next calls Lourdes collect, and they begin preparations to hire a coyote for $1,200.