(Undated) -- Apple has some new plans in store for iPhones. A source familiar with the plans told Bloomberg Apple is developing new designs including bigger screens with curved glass.

They would also have enhanced sensors which can detect different levels of pressure. The source says that with screens of four-point-seven inches, the new models would be Apple's largest iPhones.

Citing the source, Bloomberg reports California-based Apple would probably release the new models in the third quarter of 2014.