First of all, thank you for your response.I have tried every method, including resetting. In both images above, the Android version is 13, but the security update on my device is newer. It doesn't accept flashing, I can't downgrade, I can't repair the IMEI, and I can't get RPMB. In short, I can't do anything—I am completely stuck. I'm going to let my customer down, and that is what really upsets me.