Hi, the first thing to take into account is the version of emui, the security patch that the huawei has, normally when the oeminfo is read with emui version 10.1.Xxxxxxxx when writing again it will give an error for the new security, so There is no choice but to downgrade and it is most advisable to do it by sd or otg, thus avoiding brickeos or the phone being put in fastboot mode or erecovery mode, greetings.
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