SIM-only generally describes the connectivity service without a new phone bundled into that service arrangement. It does not mean that every available SIM has the same term, payment model or allowance.
Check the relevant details
Check data, calls, texts, any speed conditions and the minimum commitment. Identify whether the service renews automatically and what happens when the included allowance ends.
Look for the important distinction
Use your ordinary pattern of activity as the starting point. Data used on a home Wi-Fi connection is different from mobile data. International minutes, roaming and app-specific features should each be checked separately.
What this means for your decision
The useful comparison is the whole agreement: service period, conditions, payment schedule and features you will actually use. An attractive label cannot establish device compatibility or local reception.
Prepare three notes before a call
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