Yes, a significant advantage of utilizing CoreESIM is the ability to maintain your existing physical SIM card in your device. This configuration allows you to continue receiving calls and SMS messages on your home number while simultaneously leveraging the CoreESIM for cost-effective mobile data. You control which line is used for data, ensuring seamless communication across both your primary number and your travel data plan.
HELP CENTER
Can I retain my primary phone number for calls and SMS with CoreESIM?
Updated April 22, 2026
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