You can have up to 4 SIM cards with the same mobile number provided you have already activated VoLTE technology (Voice over LTE). First one would be the primary one and the rest three would be secondary ones.
There is no need to switch between SIM cards as all four of them are activated simultaneously.
You can make outgoing calls, send SMS and use mobile internet using any device/SIM card.
Incoming calls are delivered to ALL devices simultaneously.
Incoming SMS are delivered ONLY to the primary SIM card.
International Roaming service is available with OneNumber, provided that the device used supports roaming capabilities.
OneNumber is available for all monthly plan customers (RED Business / FREEDOM / BLACK/ Classic) on top of plan's relevant charges.
In case VoLTE technology is not activated yet on your device, you first need to activate it and then choose OneNumber.
Terminate Multisim service,
Activate VoLTE technology and then
Activate OneNumber service.
Note: Apple Watch does not require a separate order placement for OneNumber service. OneNumber is automatically activated via the "On device activation" method followed to activate eSIM.
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