It looks like the folks over at Xiaomi have already put up a question and answer section in their official forum concerning detailed information of the recently revealed Xiaomi Mi 5 flagship device. Basically, the Xiaomi Mi 5 will support LTE bands: 1 / 2 / 3 / 4 / 5 / 7 / 8 / 12 / 13 / 17 / 18 / 19 / 20 / 25 / 26 / 27 / 28 / 29 with bands 38 / 39 / 40 / 41 being the uncertain ones.
Apart from that, the Xiaomi Mi 5 is said to be bootloader locked by default, and the company has in very clear terms mentioned that it does not recommend that one unlocks the bootloader simply for security reasons. Of course, this is not going to stop the hardcore enthusiasts from doing so out of curiousity as well as in the spirit of encouragement, but for general users, it is best to leave the bootloader locked and alone.
Not only that, Xiaomi has also recommended that Mi 5 owners utilize the “Mi Cloud” services just in case that the handset in question gets stolen or lost. In such an instance, the unlocked bootloader will offer zero protection for your data. So far, we know that the most affordable Snapdragon 820-powered smartphone to date (less than $300 a pop, can you believe it?) will launch in its core markets at the moment, with whispers of a Windows 10 ROM being planned for it as well.