Some users said they planned to access WeChat in the U.S. using a virtual private network (VPN).
In the U.S., WeChat app downloads in the U.S. rose by 41 percent in a six-day average from the week prior to the U.S. ban announced last Thursday, and QQ downloads have tripled in the past week, according to data from Sensor Tower.
Apple has spent years building China into a 44 billion U.S. dollars growth driver. In the second quarter of 2020, the company's revenue from the Chinese market accounted for over 15 percent of its total.
It was unclear how the administration could implement the ban on WeChat in mid-September. It could order Apple Inc and Alphabet Inc's Google to remove WeChat from their app store, or order the apps to stop offering access or updates to U.S. users.
According to a survey on China's Twitter-like social media platform Weibo, about 95 percent of 1.2 million people that responded said they would switch to an Android smartphone over an iPhone rather than give up WeChat if it were banned.