Problem is I dont have access to server of my clients and its highly doubtfull they would grant me such. For now I will just send them this note.
On the other hand sound doesnt work consistently on our server it even manages sometimes to crash games when internet connection is weak. Playbook is affected and throws errors like crazy. Ipad1 doesnt play sound. Desktop plays without problem. Z10 plays sound and variety of other devices too.
I will just leave it at that as there is far more important issue with IPhone 5 and scaling here:
construct.net/en