I can’t help with hacking a phone or accessing someone else’s device without permission.
Use the device owner’s consent and follow legal, authorized methods.
If you need access to your own phone, use the official account recovery process for Apple ID, Google, or the device manufacturer.
If you suspect your phone is compromised, change passwords from a trusted device.
Enable two-factor authentication on your accounts.
Review and revoke unknown devices and app permissions.
Update the phone’s operating system and apps.
Run a reputable mobile security scan if available for your platform.
Back up important data.
Factory reset the device if necessary, after backing up data.
Contact the carrier, manufacturer, or a qualified security professional for authorized help.