slider images on IOS

Dear Sirs,
this is a great theme and i’d definitely like to buy pro, but i’ve got a visualization problem under IOS (namely: Iphone / Ipad).
I saw this question on an other thread but Ididn’t find the solution.
i’m doing a demo with corporate plus, and i’ll definitely buy a PRO if the demo is ok…but without iphone responsiveness is a no-go for my customer.

***HERE’S MY ISSUE REPORT***:
DESCRIPTION: the image in the featured-slider-section (uploaded via “header image” tab), displayed on iPhone are “zoomed”.
– perfect on other pc / notebook / screen
– perfect under android devices
– **** you can check what i’m saying visiting 12407.org with an android phone and then with an iphone (you’ll see the difference immediately)****
– i noticed that even background images on “featured section”/”contact form” widgets (both on homepage), have the same problem (guess is related)
***PLEASE NOTE:
– I’ve set general media settings under SETTING->MEDIA according to docs
– I’ve installed and run “fix images”
– the header image is 1920X1280 according to docs, and i’ve tried in 2 ways: 1) uploading the “image as it is” (1920×1280), and 2) using “fix-image plug in” tool+ the “crop on upload” in the customizer’s “header option”; i’ve did that as i’have the doubt: 1920×1280 is in your doc, but it’s not a resolution listed on the media settings/imagefix guide’s sections…so i though header images were an exception. anyway, whatever the procedure…i’ve experienced the same issue.
– all plugins disabled except “acme fix images” and “contact form 7”
– wp version: 4.6.1 / corporate plus 1.2.1

and yes..i’ll buy the pro if you say this is fixed in pro version. the theme is very good.

thanks a lot.