The Surface Duo is one of the few recent examples of a new form factor in smartphones.

That begs the question: is the Duo best used as a primary phone, or a secondary device to compliment an existing phone?

The unique form factor of the Surface Duo led some people, including our own Ryne Hager, to wonder if it should really be called a phone at all.

The Surface Duo connects to LTE, can answer phone calls, and fits in your pocket, so many potential buyers are obviously looking at it as a replacement for their current phone.

The Surface Duo might feel like a regression from your current phone, depending on what features you're used to.

You can absolutely use the Surface Duo as your one and only phone, if you want.

However, it might feel like a regression from your current phone, depending on what features you're used to.

There's a good chance that future iterations of the Surface Duo will bridge the feature gap with traditional top-tier smartphones, but the current model might not be the best outright replacement for your current phone.