Given the risks above, here is the only safe workflow to update your firmware:
Not directly. Firmware fixes stability and security, not raw speed. If you are paying for 1 Gbps, you will still get ~940 Mbps after overhead. However, if old firmware had a packet loss bug, an update restores your real-world speed. g-1425g-b firmware
If you cannot get a firmware update immediately, try these workarounds: Given the risks above, here is the only