Many functions lost after upgrading to OS5 on iPhone 3GS

Question

Recently, I've upgraded my OS for my iPhone 3GS to OS5 version, and many of the useful, or rather basic function on the default iphone apps are gone.
For example, firstly, the symbol in the calendar app is missing, and I could no longer add an event or activities when I open the calendar overview application. Although, there is a new app called "Reminders" which came with the new OS5 version, I could only input one alert reminder, which in the past I could create two alerts to alert me twice (different day/time count-down) for the coming event activity.
Second, the "Contacts" application. Likewise, same issue with that of the calendar app, the symbol too was missing and no longer available to add new contacts. I have to open up the "Phone" app, and had go onto the recent calls tab to create a new contact. Another added bug for the "Contact" application, is that when I select on any of my contact in the phonebook, the "Edit" is no longer available too. It used to have it there...now I can't edit anything or add any further information of a particular contact, not to mention delete/ remove it too.
Third, I heard the new OS5 is able to allow 3GS iPhones to function/ act as a router for internet tethering when personal hotspot is turned on. But it seemed like, it only works on iPhone 4 and above.
Fourth, I used to be able to set to manual synch whenever I plug my phone to my comp, but I can no longer do so as the iTunes does not automatically open when I plug my iPhone into my comp. I had to tick the "open iTunes when iPhone is connected", but it automatically synch my phone and backup the data when I wanted to manually choose to do it like before selecting through the "File" in the top menu.
So far, these are the major basic problems I've encountered. Would Apple please dedug and resolve these problem ASAP??? I am getting pretty impatient after have feedback to Apple since 3 weeks ago after the upgrade, yet no new OS updates is been available to resolve the bugs..
"Disappointed iPhone user..."

Answer 1

valenceparadigm wrote:
The question I have is; "WHY does this work?"
How about it Apple "Gurus"
Well, it would seem that the issue here is that iOS4 is not properly reading the backup that was created before the update. Or the backup is not being created in a properly formatted manner. There are just too many cases of a post upgrade issue being solved by restoring as a new phone for it not to be bad data.
Pain in the hiney, I know. And this is nothing new. All the way back through the iPhone's iPod roots, there has alway been a point in the troubleshooting tree that comes down to "restore the iPod". Just a more awkward thing now that the iPod has evolved into a phone and is trying to keep any number of settings straight. Not to mention no one wants to take their phone down unless there is no other option.