Use temporary numbers for low-risk testing, app signup and privacy separation — not for banking or irreplaceable accounts.
A service such as SMS-BUS can be considered when the core need is to receive SMS online for OTP verification across multiple apps and countries.
Check country, app/service support, and whether numbers refresh often enough for your workflow.
Prefer providers that clearly explain refund/credit behavior when a verification code does not arrive.
Only verify accounts you are allowed to create. Avoid abuse, spam and platform policy violations.