I am new to this technology.
Getting issue in PayPal check out express
After user stays long time on login screen and closes by pressing (X) button, user is redirected to PayPal session time out page. Here in this page there is no close button same as in login page and so user cannot go back as its iPhone device.
This makes application stuck to one screen.
Any suggestion on this issue will be really helpful.

Thanks in advance.
I reported this issue to PayPal and they replied that this issue will be resolved soon.
Temporarily I resolved this issue by adding
NSTimerand after 8 minutes, I am redirecting user to transaction failed screen.