I want two Sims to run at the same at time

I want new SIM to run at the same time as my old one

SimonD10 do you want the same number on 2 SIMs or do you mean keeping 2 numbers active during a port in?

Is it possible to run 2 Sims running, one in a router and one with my cell phone? L

Yes, but each sim would need its own number, as far as I'm aware.

DaveUK is correct SimonD10 you cant have the same number on 2 different SIMs.