My answer is as follows: the new phone of Redmi has the steps of checking the phone. First, we open the phone, and in the case of no Internet connection, we can check the system version of the phone. In the system version, we can check the activation time. If there is no problem with the function, the test is complete
1. See whether there are fingerprints on the front and back membrane of the machine, and pick it up gently from both sides to see.
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2. Boot to see directly into the desktop must not be unsealed! Dialer input *#06#, see and Cato, back stickers, packaging box is consistent, not the same, must not be unsealed.
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3. There will be bubbles when the mobile phone film is uncovered, see if there is offset on the back, and carefully see if there is a fingerprint.