It's exactly the opposite, at least in the Western world.
"
Apple loyalty sits at 93% of surveyed consumers, with Android lagging behind at only 80% loyalty rate"
www.bloomberg.com
'"[A] recent [unnamed] study
showing that 92.6% of iPhone users plan to stick with Apple for their next phone, which is compared to only 74.6% of Samsung users," says Bionic. "64% of iPhone users have stated that they are highly unlikely to switch to another phone brand in the future."'
A study of brand loyalty claims that Apple users are enormously more loyal that Samsung owners, but they're both easily beaten by Netflix.
appleinsider.com
I do belive the retention rate for Google Pixel phones and high-end Android phones is also very high.