Huawei honor 6 upgrade to EMUI3.0 and returned to EMUI2.3 version

1 upgrade notes
1.1 matters needing attention
Please read the version of the characteristics, cautious upgrade.
1) version of the software requirements
A) to ensure the use of mobile phone before the upgrade for the Huawei original version, no other online non official version of the upgrade, otherwise there is a risk the upgrade is not successful and may introduce unknown problem.
B) please don't try to customized version of the other countries, otherwise there is a risk the upgrade is not successful and may introduce unknown problem.
C) if root or file system modification on the phone, please don't try to upgrade or return.