I can provide a troubleshooting checklist if the install fails.
The process typically begins at the official TuTuBox website using the Safari browser. Because Apple does not authorize these installations, the "Install" button triggers a prompt asking for permission to download a configuration profile. This profile is the digital key that allows the third-party store to exist on the device. Install TuTuBox - Up to iOS 15.6
: Always use the native Safari browser for the initial download. I can provide a troubleshooting checklist if the
: You must manually trust the developer in Settings > General > VPN & Device Management. This profile is the digital key that allows
: Apple can disable the app at any time by revoking the certificate.
Once the profile is downloaded, the real work happens in the iOS Settings app. Navigating to "VPN & Device Management" reveals the TuTuBox profile, which must be manually installed and trusted. iOS 15.6 is particularly vigilant about security, so users often encounter a "Untrusted Enterprise Developer" warning the first time they try to open the app. Resolving this requires one final trip to Settings to "Trust" the developer certificate.