Phone hacked ? Not switching off

Unless your daughter has jailbroken her phone, it has not been hacked.

Have you tried a forced restart?

If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support

naheed82 Said:

"Phone hacked ? Not switching off: Hi my daughters phone may have been hacked - how do I get support for her ?"

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Modifying Credentials:

If you/her are suspicious of Apple Account security, then recommend to her that she modifies her credentials. Have here see this:

• Modify: your login credentials (Using Both a New eMail and a New Password for each and all sites)
• Associate: a different method of payment to your account
• Enable: Two-Factor Authentication for Apple ID and for all other accounts that have such an applicable option