China Unicom has committed to investing CNY14 billion ($2.2 billion) to upgrade its mobile networks and fibre infrastructure in Shanghai over the next five years.

The operator, China’s second largest by number of subscribers, was the first to sign an “Internet +” cooperation agreement with the Shanghai municipal government, according to

The investment in mobile and fibre networks in the city is aimed at significantly raising broadband speeds. It also will promote the use of intelligent applications in various fields.

China Unicom said it plans to deploy tri-band carrier aggregation on its 4G network to boost the theoretical peak speed from 150Mb/s to 500Mb/s by 2018 and to 1Gb/s by 2020, reported. In addition, the company will deploy 10Gb/s passive optical technology, with the goal of reaching six million residences with FTTx by 2018 and seven million by 2020.

It aims to have citywide VoLTE coverage, including HD audio and video calls, and VoWi-Fi service this year.

The operator also plans to have citywide NB-IoT coverage next year after deploying 3,000 base stations to support applications such as intelligent parking and environmental monitoring.

To expand international bandwidth, it will upgrade Shanghai’s metro network from 1,240GB to 2,400GB this year and to 6,000GB by 2020.