Thanks for all your answers actually the environment it's very complicated i have 45 Aps neighbours, the materials of construction included Glass, concrete, stone, metal, and on the VIP areas a lot of wood (real wood, cedro).The iphone issues occurs on the 2 sides on R500 to R300, right now i change my settings for a Ruckus peticion and now i feel the network works better.
I put the smart-roam on 3, and i check the power of all my APs do not have more power of overlapping than 30 to 40 %.
My frecuency works on 2.4 on 20 Mhz and 5.0 auto.
I comment any changes or result.
Kind Regards.