This started yesterday on another phone on my plan. The phone holder got a text from shortcode 9329. It said: Your username is __. Thank you
Then this: From 9380174963@ mxcloudingxa.ga:
Great! Your recent order #118360 generated a 330 Gift card applicable to your account, to activate ( https://goo.gl/auxNdY )
I was phished exactly the same way today. Same shortcode msg to begin with, then this from shortcode 6245: firstname.lastname@example.org Fantastic! The order #829676 generated a 592 Gift card applicable to your account, login at (https://goo.gl/oiPObT)
I think this is what's going on. The scammer gets a mobile number. They somehow trigger the carrier to send a legitimate response to a query for account username. Then they immediately send a text to the same number so it looks like they're related.