Let me ask a simple Qs: Why would AT&T (if it was involved) ask to only remove the GV app on iPhone? Wouldn't Blackberry and Android have lost their GV apps too

Let me ask a simple Qs: Why would AT&T (if it was involved) ask to only remove the GV app on iPhone? Wouldn't Blackberry and Android have lost their GV apps too? Blackberry and Androind users can still user GV apps, and AT&T has denied any involvement in this fiasco, leads me to believe it was all Apple's doing.