Hi I recently purchased the Aukey BT-F4. I connected to my device successfully and used it for a trip. The second time I tried, the Bluetooth wouldn't connect. I then unpaired my device and ever since, cannot coax the F4 to pair with anything. If I disconnect from power and reconnect again, it just shows the FM frequency. I can change frequency, but no other buttons (as described by the manual) work. I.e. the multi-function button will not turn the F4 off/on. I purchased it from from Amazon.co.jp while there based off good reviews. After receiving it, I have since travelled back to my home country in South Africa (where online shopping is somewhat limited). So returns are now a somewhat complicated option. Any advice would be greatly appreciated. Is there some way to "hard-reset" the F4? Regards -- Andrew