While iOS 6.1.3 is available for some time, Semaphore offers an updated version of its software TinyUmbrella 6.13.00 to save SHSHs files on your iDevice under 6.1.3. All devices are compatible.
The developer states that validation APTicket is not supported, but it will be in a future update of the famous program to backup SHSHs files. For the moment, we therefore recommend you use iFaith for this backup.
As usual, TinyUmbrella is available on both Windows and Mac and is compatible with iPhone, iPad, iPod touch generation. You can download it for free via the following links: