Fixed Xiaomi Redme AirDots left earbud no sound problem
When you put on both the earpieces of the Xiaomi Redme AirDots wireless earbuds, by right you just need to Bluetooth connect to the right earpiece (Redmi AirDots_R) and the left earpiece will connect itself automatically to give you a stereo audio experience.
After some times of usage, I noticed that my left earpiece no longer automatically connects to the right earpiece to form the stereo audio, and it has no sound unless I connect to Redmi AirDots_L, which will in turn causing the right earpiece to have no sound.
Here is the fix to solve the problem:
Step 1: Unpair the Bluetooth device Redmi AirDots_R (and Redmi AirDots_L, if any) in your handphone's setting, or any other device that paired with the Redme AirDots earbuds.
Step 2: Shutdown and reset both the earbuds together.
Long press the button of both the earbuds together for at least 15 seconds. You will see the red and white lights of both the earbuds flicker alternately and then go out. Very important - do not release yet! Continue your long-press, after a while, you will see the red and white lights of both the earbuds flicker alternately again, and then go out.
You need to hold your long-press until the red and white lights would not turn on again.
In my first few attempts, I failed this Step 2 and the problem still remain unfixed, because I thought it was done after one time of lights flickering and go out. It turned out that there will be second or even third round of lights flickering and go out cycle, before the reset process is totally done.
Step 3: Put back both the earbuds into the charging box. Wait until both of them enter the charging state (red light on). Let the charging to continue for at least 5 seconds.
Step 4: Take out both the earbuds from the charging box. The left earbud should now be trying to pair itself to the right earbud, and the right earbud should now be trying to seek for a pairing device.
Step 5: Go to your handphone's Bluetooth setting, search and pair with Redmi AirDots_R. Your problem should be fixed by now.