With stalling iPhone sales resulting in significant price cuts and legal battles pushing legally motivated iOS updates, Apple is teasing though a patent showing a new iPhone upgrade.

The company has filed a patent detailing the return of Touch ID and how it would work alongside Face ID in new iPhones. According to the patent, the Touch ID is built into the display of the iPhones. It demonstrates an iPhone operating as a backup to Face ID for unlocking iPhones but it can also operate as a standalone authentication method itself.

This is Apple’s second leak detailing an in-display Touch ID iPhone in a month. Earlier in December, Apple also filed new iPhone Touch ID patents devised by engineer Dale Setlak, who joined from Authentec, the company Apple bought in 2012 to acquire the technology behind Touch ID.

Touch ID offers easy unlocking of a phone using your fingerprint, while is also adds a layer of security combined with simultaneous verification with your face.