Agreed on encrypting the phone and limiting what data you store in the cloud. Try to self host stuff where you can as well,, if the cops have to serve you a warrant that's better than them serving it to a third party on your behalf!

For the other comment, while you're not technically wrong, the problem is if there's a backdoor a government has in a phone, it won't stay secret forever, and that goes double for a well funded adversary like the US Government. It's best to advocate people get devices with up to date security patches and ideally running an open source OS and hopefully some day on an open hardware device. Open source isn't a cure all, but more people can look at and audit it, to look for bugs and backdoors, same with hardware.