Solving Xiaomi yi can't connect to cellphone and wifi can't be turned off

Some time ago my xiomi yi had a problem, when trying to connect to a smartphone it always failed. After the wifi button on the xiaomi yi was turned on, it couldn't be turned off again. I suspect the problem is with the firmware. To solve it, I tried to update the firmware with the latest one. Of course, the update cannot be done directly using the xioami yi application on the smartphone, because it cannot even connect to the smartphone. Then the update must be done manually. 

For how to update the firmware, I have written in the previous article. Please open the following link and follow the instructions

Don't forget to make sure your xiomi yi battery capacity is more than 50%. After the update process is complete, my xiomi yi is finally normal again :). All settings and passwords stored will return to the original as when we bought new.

That's my sharing about how to solve problems on Xiaomi yi can't connect and wifi can't be turned off. With this method, you may also be able to solve other problems on xiomi yi.