Hello, All. It is necessary to downgrade or update the software via the base station’s NE file. At the same time, there is no donor on the required release to upgrade or downgrade the software versions. For example, the base station is running version 20 and needs to be downgraded to version 19. Or there is a base station running version 19 and needs to be downgraded to version 17. Since the syntax of NE files varies, I would like to know how you perform this task and which method is the easiest for you. Thanks.