Revenue in January reached a record high, with operations returning to normal and shipments increasing at the Zhengzhou campus in China, a centre for iPhone production, the company said in a statement.

Production of iPhones faced disruption ahead of Christmas and January's Lunar New Year holidays, after curbs to control COVID-19 prompted thousands of workers to leave Foxconn's factory lines in Zhengzhou.

(Reporting by Ben Blanchard and Meg Shen; Editing by Lincoln Feast.)