well, half-problem solved.
i flashed again to the 20171011-0929 and i can make calls and fully use 4G LTE network. the imei issue wasn´t solved yet (still 111111111111 in slot 1 and 222222222222 in slot 2) because i came home to the christmas and the new year and the phone box with the imei sticker is at work. only at january 2nd i´m going to have the imei with me.