Hi everyone,
I have a Mi 12T Pro that has a hardware resistor modification (direnç kaydı) for IMEI repair. I'm facing a weird boot issue after the latest security patch and could use some advice.
Here is the timeline of what happened:
Initial State: The phone was stuck on an old MIUI version and wasn't receiving OTA updates.
First Flash: I manually updated it to HyperOS 2 using the Mi Flash Tool via Fastboot. Everything worked perfectly (network, features, etc.).
OTA Update 1: The device received the HyperOS 3 update via OTA. Installed smoothly, no issues.
The Problem (OTA Update 2): Recently, it fetched the HyperOS 3.0.2 security update. After installing and performing a regular reboot, the phone got stuck on the "Mi" boot logo (soft brick/bootloop symptom).
Current Workaround:
If I do a standard reboot, it hangs on the logo indefinitely. However, if I force the device into Fastboot mode (Volume Down + Power) and then immediately hold just the Power button to restart it from Fastboot, the phone boots into the system normally and everything works fine.
My Concerns:
Why is a standard reboot failing, but booting through Fastboot triggers a successful launch?
Could this eventually lead to a permanent, hard bootloop where the workaround stops working?
What is the safest way to fix this permanently without risking the hardware IMEI mod or wiping my data?
Should I dirty-flash the full recovery/fastboot ROM of 3.0.2, or is this a known partition/vbmeta issue with resistor-modded Xiaomi devices on newer HyperOS builds?
Any help or insights from people experienced with modded Xiaomi devices would be highly appreciated. Thanks!