Does it work the same as for PC deploy, is it supported?
(I know it’s one drawcall for each different texture 
)
Yes
It’s one draw call for each different pass. Some passes have 2 textures.
What do you mean by “pass”?
a pass is a single go within which given operations are performed.
On pre 3GS, you can use up to 2 different textures in a pass so if a shader requires to blend 2 textures, you can do that within 1 pass.
On pre 3GS.
And after?
after you can technically have up to 8 textures in a pass, but for performance reasons, you would still keep it on as little as possible.
especially as 3GS+ also includes ipad and iphone 4, which have 3GS gpu but 4 / 5.2 times as many pixels to render while having the same pixel budget
Thank you very much Dreamora, you know a lot of this stuff 