There doesn't seem to be a lot of specifics here. Does this mean I can send anyone a text that has some magical character in it to trigger this S@T Browser to e

There doesn't seem to be a lot of specifics here. Does this mean I can send anyone a text that has some magical character in it to trigger this S@T Browser to execute arbitrary AT commands? Or is this some kind of special SMS like a type-0 SMS or something?