How do I stop hackers from hacking or turning off my iPhone

Following the recommendations in this article is a great place to start.

And don’t share your credentials with ANYONE. Unfortunately, the most devastating compromises can occur when “friends” - who often have extended physical access to your phone - ALSO have your creds.

Use the built-in privacy and security protections of iPhone – Apple Support (AU)

(continued from above)

The greatest vulnerability of an iPhone is the Human using it.

Treat every unexpected or unsolicited message as a possible threat.

POSITIVELY NEVER, EVER enter your Apple credentials into a “link” sent in any ANY text or email no matter how “authentic” it might appear.

(Independently browse to the Apple site yourself)

Read and re-read this article regularly.

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

Acemanvi wrote:

How can I stop hackers from hacking my phone. Or stop them from turning off my iPhone?

Do not jailbreak your phone. Do not let anyone have unsupervised access to it while it is unlocked.