What does this messages icon mean?

[vhcvhc]

At the right hand side of ‘enter message’ is this audio icon, but why does it have the number one on it? If I’m entering text the icon becomes a green send also with the number one ...

 

[SpookDroid]

It means SIM 1

 

[vhcvhc]

Thanks!

 

[Jims S5]

Record voice

 

[fuzzylumpkin]

Record voice

Nice guess, now go back and read the actual question to find out why you got it wrong lol.

 

[vhcvhc]

Thanks for replying, but it was the 1 I didn't understand - SpookDroid explained it meant Sim1.