Would you like to use 2 mobile phones with the same number? If so, visit a point of sale and request 2 SIM cards and activate the pay-for ProxiDuo option. This option is only available if you have solely a mobile subscription.
The 2 SIM cards work independently of each other and each has its own inpidual memory. In practice, this means that:
The SIM cards don’t have to be the same size. For instance, it is possible to request a regular SIM card and a micro-SIM card.
If you accidentally switch on both phones, turn off both and then switch on the phone you want to use.