Why can't my fingerprint sensor be used to unlock my phone?

After I serviced my cellphone screen, I found that my cellphone's fingerprint sensor could not be used to unlock my cellphone, but when used for other features such as opening applications, or approving other applications, I could use my cellphone's fingerprint sensor. Please help me...

Update (09/09/24)

I replaced my cellphone's LCD

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Hi, you might need to explain what servicing you actually did to your phone so that community can have enough information to help you to a resolution.

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Did you try to reset fingerprint?

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You may also check that fingerprint unlock is set to unlock phone. Go to settings and do search for fingerprint, then see what the options are set to for fingerprint.

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I had fingerprint disabled message on iPhone after a screen replacement . Resetting fingerprint worked for me. If it doesn’t it probably points towards some internal damage.

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