A thief robbed seven women of their cellphones as they were walking in Harlem over the course of about 10 days in July, police said Tuesday.

The robber, believed to be in his late teens or early 20s, kicked off his spree on July 15, when he stole a phone from a 56-year-old woman as she walked near West 132nd Street and Lenox Avenue, police said.

Two days later, the suspect struck three times within 25 minutes — all near West 125th Street and Adam Clayton Powell Jr. Boulevard, authorities said.

From 1:40 p.m. to 2:05 p.m., he stole phones from a 29-year-old woman, a 35-year-old woman and a 41-year-old woman, cops said.

The crook hit again on July 19 and July 20.

The latest reported theft happened at about 4:40 p.m. on July 25 near West 129th Street and Lenox Avenue, police said.

In that incident, the bandit robbed a 22-year-old woman, punching the victim before swiping her phone, cops said.

The stolen phones have an estimated combined value of $7,200, authorities said.