Question Param preload failed - MSM trying to unbrick Android 12

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New member
May 20, 2021
Hi, so the Android 12 beta soft bricked my OP9 and im stuck in pin verification loop. Im trying to revert back to Android 11 using MSMDownloadTool but every time i press start when the phone is connected in EDL mode, it returns "Param preload error" after about 10s. I tried different ports, i tried reinstalling all the drivers but then every time i hit the param preload error. I dont know what to do about it. I have european OP9 model (or i at least think so) but the downgrade is availible only in T-Mobile or India versions. Is that the problem, should i wait for european?

Is there perhaps simpler way to reset the OP9 back to Android 11 since it still boots up and its not hard bricked?