No. It does not necessarily mean that your connection will never be subject to speed restrictions.
Unlimited plans generally allow you to use mobile data without worrying about a fixed data allowance or speed restrictions.
For normal use, such as web browsing, using map apps, or watching videos, you should usually be able to use the service without any issues.
However, if extremely large amounts of data are used within a short period of time or if usage significantly affects the network, your connection speed may be temporarily restricted.
About speed restriction thresholds
There is no fixed amount of data usage that automatically triggers a speed restriction, and we are unable to confirm whether a restriction is currently being applied to an individual connection.
This may vary depending on factors such as local network congestion and your usage conditions.
Important points when using tethering
When using tethering to connect multiple devices, data usage can increase quickly.
As a result, a temporary speed restriction may be applied sooner than with normal use, so please be mindful of heavy data usage.