DNS helps a device find a server's address. It does not increase the physical capacity of the broadband line or Wi-Fi radio. A resolver change can help a name-resolution problem, but it is not a universal buffering fix.
Identify a lookup symptom
A service name that fails to resolve differs from a stream that plays and later pauses. Compare whether the app can load its catalogue or reach its login server. Record the exact message before changing the router for every device.
Make a reversible comparison
Use the operating system's supported DNS settings and record the original automatic configuration. Test one device first. A custom resolver can interact with parental controls or managed-network policies, so consider who else uses the connection.
Interpret improvement carefully
A successful comparison may reflect different name resolution or server selection. It does not establish deliberate blocking or prove that every later interruption has the same cause. Restore automatic settings if the change offers no repeatable benefit.
