How do I keep my WhatsApp/Primary number active?

With eSIMNum, you can stay connected while keeping your primary phone number active. Most modern devices support using your physical SIM and an eSIM at the same time, so you can continue receiving calls and messages on your original number while using eSIMNum for data.

Dual SIM support on iOS

Many iPhones offer Dual SIM Dual Standby (DSDS). This means your physical SIM and eSIMNum plan can remain active together. You can still receive calls and SMS on your primary number while using eSIMNum for mobile data during travel.

Dual SIM support on Android

Most newer Android devices also support DSDS.

Your phone can keep your primary SIM active for calls and texts while your eSIMNum provides data. The number of eSIMs you can store or activate at once depends on your device model.

WhatsApp will continue working normally

WhatsApp remains linked to the phone number you registered with — it does NOT change when you install an eSIM.

Important tip for travelers

If you leave your physical SIM inserted and active, your home carrier may apply roaming charges. To avoid this:

• Turn off Data Roaming for your primary SIM
• Set eSIMNum as your mobile data line
• (Optional) Disable your primary SIM if you don’t need calls or SMS

In summary

With eSIMNum, you can keep your primary number active for calls and messages while using our eSIM exclusively for data — perfect for staying connected on WhatsApp or other apps while avoiding roaming fees.