The e-mail icon on my Lumia 935 phone (two weeks old) has disappeared, and I cannot access the e-mail programme. Is there any way I can get it back?
You should first try to reset the cached app data and see if the icon appears back into the system. If not, you should backup your content and go for a reset. Most probably the error will be resolved with a reset and the apps will continue to work again with their factory default versions. If still the problem remains, you should go to a Microsoft certified service center and get the phone checked for the problem, which is 100 percent a software and OS related error only.