So, my friend already have a mavic mini with combo package and has spare batteries. I bought this drone from internet without battery, and i was told that is in good condition. Right now i can't connect it to the controller or phone to check the software/firmware version.
Phone can talk to the controller. It is connected with the phone.
notedfirst of all never start the drone with the gimbal cover on
also for it to connect you need a suitable SD card in the drone
and it needs to be registered to your email address before you can register it with dji
when you have a drone account with DJI it is linked to your email address so when you get another drone it has to be registered to you before it will fly even if it has been registered to another person before you purchased itDJI are constantly changing their policy on drone registration. Old man might know more than me on this issue. I registered mine ages ago, and once done, that's it. DJI are very much in control here, they make the rules (and we don't always know what they are)