Hi friends please i need a help i don't know why i can't send messages to numbers like 1346 but i can send to normal DU line help me please will send a screen shot now

Please guys if I want to send a message to du network from my note 9 is not going but if I get my sim put in another phone and try it then it goes Please I want to ask if anyone knows how to help me thanks.I have the attachment which happened

Please i need samsung Bud anyone who want to sell his or her own and i also want to know the price

Hello friends pls I don't know the button of my bixby is not working I have been pressing it I never use it since I buy this phone but when I remember and want to use it then find out is not working want to ask if there is what i most set before work...