Border patrol cannot force you to divulge a PIN or password. They can force you to apply your fingerprint.
Look elsewhere in this thread for "why not use an Android device."
Don't carry your work devices across the US border because they may be taken, can be taken out of your view, and may be duplicated (and yeah, you should have FDE on your computers etc., but don't take the chance).
They might not be able to force that on US citizens, who have an absolute right both to habeas and to enter the country. They can force it on nonresident aliens.
Look elsewhere in this thread for "why not use an Android device."
Don't carry your work devices across the US border because they may be taken, can be taken out of your view, and may be duplicated (and yeah, you should have FDE on your computers etc., but don't take the chance).