Blue number 1 next to text send button

[torontogeorge]

Does anyone know how to disable the blue 1 button next to texts and Send button on a Galaxy 7 Duos? I realize this is from using SIM 1 in a dual phone...but since I only use one SIM this is an annoying "feature".

Thanks in advance.

 

[bennyj]

Does if give you the option under network to turn off?