There have been two “early adopter” batches of the X6100 released so far and these early models didn’t have Bluetooth or WiFi working in them (and some other minor issues). The expectation is that these problems will all be fixed by firmware updates, indeed those updates have been released. If however there turns out to be a change needed to the physical machine, Xiegu and their agents have a policy of a no transferrable warranty. That means if you buy second hand, you have no recourse to support from Xiegu dealers.
Hence I would await the next batch of new models, which should have the outstanding issues fixed and come with a full warranty. This batch was opened for pre-orders in December and is expected in February. It is quite likely that you are too late and this order batch is already closed, meaning you will have to wait for the next batch of new radios in a couple of months time.
There are quite a few videos of both pre-production demo models and radios from the first “early adopter” batches showing all the various features. What I find the most interesting point is that under the hood, the radio is running a distribution of Linux which opens up the possibility of third party apps being added in the radio itself (no doubt voiding the warranty, however).
At the price point, this is not an ICOM IC-705 or KX-2/3 quality machine but it may well become a “game-changer” in the features it does offer at this price and the embedded (Linux) user OS is something the others don’t have.