A is a high-risk, medium-reward operation. If your current firmware is older than 2015 and your router crashes weekly, the upgrade can extend its life by 12–18 months. However, given the HG530’s age (DDR1 memory, 200MHz CPU), modern networks benefit more from a newer router.
If your HG530 was provided by an ISP, it might have custom firmware. Standard Huawei firmware might disable certain ISP-specific features like VoIP or IPTV. Firmware Upgrade Huawei Hg530
Absolutely not. A single packet loss during the flash process corrupts the router. Use Ethernet only. A is a high-risk, medium-reward operation