Description of problem: When you are redirected to a mobile portal when accessing from a iPhone, after clicking on "Sign In", login window is not displayed whole. Only a part of it is displayed and is not scrollable. Additional info: iPhone4 with iOS4, this issue is not present on Android phones
Created attachment 758225 [details] login window is displayed only partly
Created attachment 758226 [details] page scrolled a little bit down
Which exact version of iOS are you trying with?
I tested it with iPhone 4 running on iOS 4.2.1 (8C148). With iPhone 5 - iOS 6.1.2 (10B146) it works fine.
iOS 4.2 is not supported according to the PRD. Only 4.3 and above. Testing with anything less than iOS 5 is also a bit of a pain since Apple no longer provides the simulator for it. Note: I am running into similar issues with older versions of Android as well (and even ones which are not really that old). I will post an update when I get those working which should also fix the iOS 4.3 issues.
If you are getting issue while Sign In login window is not scrollable on iPhone then i just suggest you to go through https://www.iphonesupportnumber.com/blog/how-to-fix-an-iphone-error-0xe8000015/ blog to get proper solution.