A report from Consumer Intelligence Research Partners found that more Android users are switching to the iPhone.
The report found that 16 percent of iPhone buyers upgraded from an Android phone in the 30-day period after the launch of the iPhone XR. After the iPhone 8 and 8s were released in September 2017, 12 percent of iPhone buyers upgraded from an Android phone, and when the iPhone X was released in November 2017, that number was 11 percent.
Despite worries that the iPhone XR is dragging, it seems that this model is a popular model for Android users to switch to.
Check It Out: More Android Users are Switching to iPhone
This survey has a sample size of 165 people. Considering the size of the smartphone market, this is hardly what I call significant. The most accurate indicator of iPhone adoption trends is this one by Mixpanel
https://mixpanel.com/trends/#report/iphone_Xs