If you change your payment method, make sure that your account information matches the credit card information on file with your financial institution.
The iOS signing window is one of the more obscure details related to the iOS & jailbreak community. The signing window is the window of time in which a certain iOS firmware is able to be updated or downgraded via iTunes.
Organizing apps on iPhone, iPad, and iPod touch was always a time-consuming task. Before iOS 11, you can only drag single app to another page at a time and it could be a mess when you need to move a load of apps to different...