The validity period for your CoreESIM plan initiates precisely upon its first connection to a live cellular network in the designated region. For instance, if you purchase a plan for Hong Kong, the countdown begins the moment your device registers on a local carrier like CSL or 3 Hong Kong. Installation can be completed pre-departure, but activation only occurs when your device establishes network access in the covered territory. This ensures you receive the full duration of your purchased plan while on location.
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When does CoreESIM plan validity commence?
Updated April 22, 2026
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