The is the dual-SIM variant. Installing the wrong firmware (e.g., VOG-L09 firmware on a VOG-L29) can disable the second SIM slot or brick the modem.

| CUST Code | Region | Key Features | | :--- | :--- | :--- | | | Europe | No call recording, Google services fully supported | | C636 | Asia-Pacific | Call recording enabled, local network bands | | C605 | Latin America | Specific 4G bands, Spanish/Portuguese defaults | | C185 | Middle East/Africa | Special VoLTE profiles, dual WhatsApp support |

The safest method is via the PC software (version 10.0 or later). HiSuite can check for and install official recovery firmware. For manual downloads, Huawei’s official ROM download portal (now often region-restricted) or the eRecovery built-in tool (accessed by holding volume up while connecting to power) can fetch the latest approved firmware directly from Huawei’s servers.