The foldable Samsung phone that we've heard rumors of so many times has taken a definite step towards becoming a reality.

While the mysterious Galaxy X has already been spotted having its Bluetooth and Wi-Fi radios tested, LetsGoDigital has uncovered a new document in the Korean National Radio Research Agency database of the device undergoing full testing.

Listed under the model number SM-G888, the Wi-Fi Alliance used the same number in its testing, so it appears that this is indeed the same device. If the mysterious phone is in the testing phases of its development, it means that it is getting close to being ready for prime time.

At this stage, it would feel safe to assume that we won't see this device until sometime in early 2018. While CES is held in January, it's not known for being the stage upon which new phones are launched any more. The far more logical conclusion would be this device being announced at Mobile World Congress in Spain which kicks off on Feb. 26, 2018.

While the idea of a foldable phone is exciting, it's not going to be cheap to begin with. Whenever Samsung kicks off a new technology – such as curved screens on the Galaxy Note Edge – the first one out of the gate will set you back quite a bit. Here we are a few years later, and curved screens are a given with Samsung devices. One has to imagine that folding screens would be handled in a similar fashion.

Hopefully we will learn more about the Galaxy X in the near future, but for now, lets keep our eyes peeled for where this story goes.