Since running my first own LTE eNodeB in 2013, I acquired a few more. I now have one from NSN, Ericsson and Huawei. All of them are fully functional including the required Remote Radio Heads to actually transmit.
Operating an LTE eNodeB is not very complicated, these days it is even easier with software like NextEPC. The tricky part is setting up and configuring the LTE eNodeB because there is no standard to do so and every manufacturer has its own way. If you are lucky, you might get an already configured system and there is not much you have to adjust. If your system is new or the configuration has been erased, than it can get complicated, at least for the Ericsson eNodeB I have.