with active mobile data. You cannot link your account via Wi-Fi.
: A Windows PC, a high-quality USB data cable, and a valid SIM card with a mobile data plan.
To re-lock the bootloader, go to > Developer options > OEM unlock and toggle on OEM unlock . Then, use the Mi Flash Unlock tool to re-lock the bootloader.
💡 Permission is often granted based on a daily quota that resets at 00:00 GMT+8 (Beijing time). If it says "Quota Reached," try again exactly at that time. Your Mi Account must be older than 30 days to be eligible. Phase 2: Binding the Account Unlocking Bootloaders - postmarketOS Wiki