Need help on downgrading

kraken77

Senior Member
May 6, 2012
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Somewhere in The Earth
Hi xda members. I recently bought Mediapad M3 device BTV-DL09C209B312. ((I wanted to unlock my bootloader on ministryofsolution website for $4. the problem is, it can only be unlocked if the device were on july 2018 security patch or below. My current security patch is on november. My question is, is there any reliable tutorial to downgrade this device and unlocked it? I am afraid of bricking the device and i am not really familiar with huawei)) Please tell me step by step and what to do and what not before/after unlocking the device. Such as, do we need to save efs backup, imei, keys, oem info, any other important partition or something like that as long as it is important for huawei user. Thank you. I really need someone to guide me. Your help is really appreciated.

Edit: Skip the part for downgrading with bracket(()). Actually the unlock is supported and i misread the part where "EMUI 8 with july 2018 security patch above are not supported"
 
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