I have a bt-key3 working with a Samsung S7 Android. The device pairs readily but will often disconnect/reconnect. It also will quite often turn the space key into space. This is very irritating and makes the keyboard unusable. I have selected English US as the Android physical keyboard. I really like this hardware and want it to work.
Thank you for posting. Could you please contact us directly at firstname.lastname@example.org with the Amazon order number for your keyboard and your preferred shipping address? We will send a replacement.