Some older builds can be found on Huawei’s official cloud server using this URL pattern (no longer straightforward due to authentication): http://update.hicloud.com:8180/TDS/data/files/p3/s15/G753/g00/v123456/f1/
Huawei no longer provides direct download links for legacy firmware on its consumer website, but the following sources are widely considered safe: huawei nxtal10 firmware link
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