Wi-Fi Router
Steadiness beats speed. That is what a MOBA needs.
What it changes
Honor of Kings does not use much bandwidth. What matters is response time (ping) and how much it wobbles (jitter). Even with a good average ping, occasional spikes make your character teleport or delay a skill you already pressed. Land one of those inside a teamfight and it decides the fight. Replacing a router helps when it cuts down those spikes.
What to look at
Can it handle the number of devices in the house (your match shares the line with someone's video), does it hold a stable 5 GHz link, and how far and through how many walls is your phone. The 'game mode' on gaming routers is essentially traffic prioritisation. Before buying, try moving the router and connecting on 5 GHz. If the line itself — the contract or the building's wiring — is the problem, a new router will not change it.