Apple has  released a beta version of the software to iPhone OS 4 to developer programme members.

Some of the features included in this version are

1) Multitasking for third party applications;

2) Folders to better organise and access applications

3) Improved mail with a unified inbox, fast inbox switching and threaded messages

4) Enhanced enterprise support with even better data protection, mobile device management, wireless application distribution

5) Apple’s new iAd mobile advertising platform and iBooks.