Spitz at command problem

Hi, im living in Poland and try to force LTE band B3(FDD1800) + B20(FDD800) (T-mobile)and was play with AT command.
I change some bands etc and now i dont have internet at all just message “no internet find new network to reconnect” i was trying to change band to default but no result, even revert back fw didint help. Is there a way to rest modem to factory settings? yesterdey is works ok.

command i was trying to use is in this post: X750 Spitz is there a way to lock to band? - #16 by carrata

i was try

and some other from the post, no result at all ``