Receiving Calls on Your Primary Number
Whether your usual number keeps working depends on your device's dual SIM support.
Receiving Calls on Your Primary Number
Yes, in most cases — provided your device can keep two lines active at once.
Modern iPhones use Dual SIM Dual Standby, which keeps your physical SIM (or, from iPhone 13, a primary eSIM) registered for calls while a second eSIM carries data. Most recent Android devices do the same. Older or entry-level devices sometimes allow only one active line, in which case enabling the Simsima eSIM disables your home line.
How to Keep Both Working
The Cost Warning
A registered home line abroad is roaming, even with data disabled. Many carriers bill for incoming calls whether or not you answer, and some bill simply for being registered. Check your operator's roaming terms before relying on this.
The cheaper alternative: enable Wi-Fi Calling before you leave and receive calls over Wi-Fi at no roaming cost.
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