Unusual call symbol - Samsung S9

[Android Central Question]

Hi there, do you have any idea what the call with some data waves coming from it symbol means? It also has the 1 number in the right down corner and It is not the same one for wifi calling. Thanks.

 

[SpookDroid]

Might be VoLTE. Does it show only when on a call or all the time? If you have multiple SIMs/Lines (for instance, on TMo's DIGITS), that might show up as well. If you could share a picture that would help in case this isn't it.

 

[lucianus_luciferus]

If the phone is a dual sim phone that icon means you are using sim 1