I recently received my XQ-50 Pro from Amazon and hooked it up. No problem pairing but the text on the screen is in Chinese which is unacceptable. I found the firmware download and intallation directions. No problem upgrading to 1.6 and rehooked the unit. Upon pairing my tablet, PC, and phone all asked for the PIN number to connect. There is no PIN and I have no way to connect. This was a complete failure. I hooked the unit back up to my PC and installed firmware 1.4 with no issues. When I re-paired it to my tablet there were no issues and the sound was restored. THE TEXT IS STILL IN CHINESE 100% of the time. This thing is a dumpster fire. A simple button to change language setting would have been too simple. I will wait to see if I can get some help otherwise this is going back to Amazon so fast your head will spin.