Using 2 phone on same account?

[dreamingat30fps]

I'm trying to figure out if I can use 2 devices on the same account? Meaning if I have 2 different phones and sometimes I want to use one phone and sometimes the other. Apart from swapping the SIM each time is there a way to get an extra SIM or digital SIM or something? Thanks

[VSBL-XP]

Swapping SIMs is really the easiest way to accomplish this.