Staff Techdrunk 
This is especially for iPhone owners who might be planning to get the new iPhone OS 2.2 upgrade. According to iPhone Atlas, users who updated to iPhone OS 2.2 are facing many problems like third party application, e mail and more. Some major problems are:
Third-party applications broken
Users have complained that some of the third party applications are not working properly on OS 2.2 of iPhone. Applications that use CoreAudio are the most problematic ones.
Could not Connect to Internet
Some iPhone users found themselves unable to connect to the internet over the EDGE or 3G cellular networks.
SIM card not inserted
Users are also experiencing the issues with their SIM card not being recognized after inserting in iPhone. The phone is showing error that the SIM card can not be inserted or a PIN lock has been set (even when it has not been set).
Problems in deleting emails
This problem is specifically with AOL users, who are facing difficulties in deleting their e-mails from accounts after OS2.2 update.
App Store extremely slow
Users have complained that they are facing extremely slow application speed while using App store after the OS 2.2 update.
KM instead of miles in Google Maps
Google map in iPhone is displaying kilometers instead of miles for different countries. There are complaints that users are not able to use Google Street View on iPhone after updating to OS2.2
After getting so many negative feedbacks about OS 2.2 update, Apple has released an update for iPhone and iPod touch. It has several features and security improvements for both the devices.
