While most people manage quite well with a single SIM card, if you want better demarcation between your work and home life, or you want to make roaming with multiple SIM cards easier, then having the extra SIM already in your smartphone is going to be a real time-saver.
But how do you install an extra SIM or two into the iPhone 6s? After all, that SIM tray is far too small to accept another SIM.
