A fake livery driver sexually attacked a woman in Brooklyn but fled with her cellphone in his car — so the NYPD used the “Find My iPhone” app to trace it to his New Jersey home, cops said.

Anjum Yaque, 38, was arrested in Woodbridge early Sunday. The woman, 22, said she hailed his black SUV in Manhattan Saturday afternoon and awoke from a boozy snooze at about 5:40 p.m. to find him groping her in the back seat near the Brooklyn Army Terminal.

He was charged with forcible touching, unlawful imprisonment, assault and petit larceny.