1. Connect the mobile phone through the USB interface of the computer.
2. Open IPA Signature in AISI Assistant's Toolbox.
3. Click "Add IPA File" to select the IPA file to sign.
4. Select "Sign with Apple ID-Add Apple ID", and then enter the Apple ID and password for signing (it must be the same as the Apple ID on the mobile phone device).
5. Check the IPA file to be signed and the Apple ID used for signing, and click "Start signing".
6. After the signature is successful, click "Open the location of the signed IPA" and double-click the IPA file directly to start the installation.
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