No, CoreESIM's regional plans are designed for seamless cross-border operation. When transitioning between covered countries, such as from Argentina to Brazil, your device will automatically detect and register with an available partner carrier. Ensure 'Data Roaming' is enabled in your device's cellular settings for this automatic transition to occur. No manual APN adjustments or carrier selections are typically necessary, providing uninterrupted service.
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Are manual network settings required when crossing borders with CoreESIM?
Updated April 22, 2026
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