Unlimited traffic is a plan attribute
Some static plans are supplied with an unlimited traffic allowance. Check the chosen plan and the delivered allowance; this does not apply to every product. Rotating residential and mobile GB bundles remain metered.
Bandwidth is not throughput
An unlimited data allowance does not promise unlimited speed, threads, simultaneous sessions or destination access. If a workload depends on any of those limits, confirm them with support before purchase.
Choose on the whole requirement
Consider country, protocol, address family and connection stability as well as data allowance. Use a small compatible configuration to validate your workload before increasing capacity.