System restores often require substantial free space, not only for the backup data itself but also for temporary extraction and verification. If the device’s internal storage is nearly full, the restore process can abort mid-way, leading to a generic “install failed” message.
The most direct fix is to download a fresh, authorized copy of your device's firmware directly from Huawei’s servers using the internal eRecovery menu. System restores often require substantial free space, not
If the restoration fails due to a corrupted data partition or full storage, clear the cache and user data. This step will erase personal data. Turn off your device. the restore process can abort mid-way