AT+CUSD Command for Multiple Menu: Session closes and I can't get to the second menu

Question

AT Command for USSD with Multiple Menu.

When I check on normal mobile I have to follow the command like this -

USSD Command - *401*1*22# 

I got a reply as

Welcom to ---. You Will receive the menu shortly. Please exit

after few second I got a menu as

1 Bill Payments 
2 Others 
Reply with your choice
Here I got two button as "Answer" and "Back"

I have to click on "Answer" and reply with "1" for the next MENU.

I try the AT Command as follows

AT+CUSD=1,"*401*1*22#",15
AT+CUSD=1,"1",15

I got the message as -

+CUSD: 2,"Welcom to ---. You Will receive the menu shortly. Please exit",15
+CUSD: 1,"1 Bill Payments2 OthersReply with your choice",15

Here the session closes and I am unable to get to the next menu.

How can I move to the next menu after replying 1?

Answer 1

AT+CUSD=1,"*401*1*22#",15

After u receive menu and choose as follows.

1

and press ctrl+z