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Waleed Ali, a Careem Inc. driver, known as a captain, left, has lunch at the company's cafe on Murree Road in Rawalpindi, Pakistan, on Tuesday, Dec. 12, 2017. Ride-hailing company Careem plans to expand across as many as 30 new cities in Pakistan as it taps into the country's growing middle-class. Photographer: Asad Zaidi/Bloomberg via Getty Images

Waleed Ali, a Careem Inc. driver, known as a captain, left, has lunch at the company's cafe on Murree Road in Rawalpindi, Pakistan, on Tuesday, Dec. 12, 2017. Ride-hailing company Careem plans to expand across as many as 30 new cities in Pakistan as it taps into the country's growing middle-class. Photographer: Asad Zaidi/Bloomberg via Getty Images

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A Careem Inc. office stands in Islamabad, Pakistan, on Tuesday, Dec. 12, 2017. Ride-hailing company Careem plans to expand across as many as 30 new cities in Pakistan as it taps into the country's growing middle-class. Photographer: Asad Zaidi/Bloomberg via Getty Images

A Careem Inc. office stands in Islamabad, Pakistan, on Tuesday, Dec. 12, 2017. Ride-hailing company Careem plans to expand across as many as 30 new cities in Pakistan as it taps into the country's growing middle-class. Photographer: Asad Zaidi/Bloomberg via Getty Images

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A Careem Inc. driver, known as a captain, right, pays for his lunch at the company's cafe on Murree Road in Rawalpindi, Pakistan, on Tuesday, Dec. 12, 2017. Ride-hailing company Careem plans to expand across as many as 30 new cities in Pakistan as it taps into the country's growing middle-class. Photographer: Asad Zaidi/Bloomberg via Getty Images

A Careem Inc. driver, known as a captain, right, pays for his lunch at the company's cafe on Murree Road in Rawalpindi, Pakistan, on Tuesday, Dec. 12, 2017. Ride-hailing company Careem plans to expand across as many as 30 new cities in Pakistan as it taps into the country's growing middle-class. Photographer: Asad Zaidi/Bloomberg via Getty Images

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Kausar Manzoor, a Careem Inc. driver, known as a captain, uses the ride-hailing company's app on her smartphone while waiting for a customer outside the Faisal Mosque in Islamabad, Pakistan, on Tuesday, Dec. 12, 2017. Ride-hailing company Careem plans to expand across as many as 30 new cities in Pakistan as it taps into the country's growing middle-class. Photographer: Asad Zaidi/Bloomberg via Getty Images

Kausar Manzoor, a Careem Inc. driver, known as a captain, uses the ride-hailing company's app on her smartphone while waiting for a customer outside the Faisal Mosque in Islamabad, Pakistan, on Tuesday, Dec. 12, 2017. Ride-hailing company Careem plans to expand across as many as 30 new cities in Pakistan as it taps into the country's growing middle-class. Photographer: Asad Zaidi/Bloomberg via Getty Images

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A customer displays the Careem Inc. ride-hailing app while booking a car in this arranged photograph in Islamabad, Pakistan, on Tuesday, Dec. 12, 2017. Ride-hailing company Careem plans to expand across as many as 30 new cities in Pakistan as it taps into the country's growing middle-class. Photographer: Asad Zaidi/Bloomberg via Getty Images

A customer displays the Careem Inc. ride-hailing app while booking a car in this arranged photograph in Islamabad, Pakistan, on Tuesday, Dec. 12, 2017. Ride-hailing company Careem plans to expand across as many as 30 new cities in Pakistan as it taps into the country's growing middle-class. Photographer: Asad Zaidi/Bloomberg via Getty Images