Hello, I have a Xiaomi Mi6 and I am selling it to be able to buy another new, but I did not perform the following operations before resetting the device and now the message appears finding device closed unexpectedly I bought the device through the Gearbest site as I do to unlock my appliance? I await a return.
If you need the purchase order imei of the device or other information I have everything here, because I was logged into the Mi cloud account before resetting it.

In short I formatted the device before doing the procedure on the miu account, can I still solve this by installing any global rom? someone to help me?