UPDATE : if you want the solution to this problem, please see this other post :

fixed : get iCloud on the officially unsupported iPhone 3G – sync works !

— THIS IS A REPOST ORIGINALLY POSTED ON THE APPLE SUPPORT COMMUNITIES IN 2011 —

Both Mail and Contacts have been working from the first moment I tried, but iCloud Calendar keeps my iPhone 3G Calendar completely empty… (the only thing that is in there properly are the birthdays of my contacts…)

I’ve tried every suggestion I’ve found out on the internet… including finding & using the proper p0?-paths, doing hard iPhone resets between every step, letting iOS come up with the proper server-paths, re-pasting the proper server-paths onto the short server-paths, turning on iTunes-sync intially (which does work) and then cutting off iTunes-sync to start wireless iCloud-sync from there (which erases my iPhone Calendar again…), deleting MobileMe completely of my iPhone, etc. etc.

My iCloud Calendar is okay on my Mac and on iCloud.com, but on my iPhone 3G nothing shows up… eventhough the settings on the iPhone seem to be correct, since no errors come up when using these (other settings were giving errors…)

And accessing iCloud.com from iOS-Safari browser is prohibited ; I keep ending up on a mobile website version that doesn’t allow any non-iOS5 iPhones…

Is there a way to recheck al settings on iCould itself to make sure there’s no problem with access-rights or something ?

These 2 suggestions I have also tried, but they didn’t work:

1- the repace “@me.com” by “@mac.com” suggestion ; but I wasn’t allowed to use “@mac.com” instead of “@me.com”, since this account never was a .Mac-account

2- the complete re-install of iOS4 on my iPhone 3G ; but I was afraid to loose some of my data while doing so… I did do a complete re-instal, but I didn’t notice any differences…

but… I noticed something else – something important I’ve not seen mentioned anywhere yet :

(only) if the iCloud-server-settings are okay, there will be a “Download (Invitations)”-button (arrow pointing downward into a U-shaped plate) in the bottom-right corner of the iPhone Calendar screen

[and if your settings are not okay, there is no button next to the “List/Day/Month”-button]

so when I noticed that there was also a small spinning ball in the upper right corner of the iPhone Calendar screen (next to the +-button), I thought I might just have been a bit to impatient…

…so I let it go while I took the time to sleep an extra night over it…

and… YES !

the next morning, everything was synced properly !

maybe I just had a few to many different calendars to sync over WiFi all at once…

(I have about 20 different Calendars inside iCal at the same time…)

now the only thing that I haven’t figured out just yet is :

why don’t the new calendar-entries (aka. appointments) I make on the iPhone sync to my Mac’s iCal within seconds ?

and neither do the new calendar-entries I make in iCal show up on my iPhone…

…how can that be ?

my calendars have been imported automatically from iCloud to my iPhone, but for some mysterious reason, new entries do not show (yet)…

the original post(s) can be found here :

https://discussions.apple.com/thread/3103493?start=90&tstart=0