Does anyone know how to change apple id on iphone 4?

Question

During the upgrade to iOS5, I set up my iCloud account with one apple id.  However, I would like to using another apple id I use with iTune but I can't seem to change the setting on my iPhone4.  When I go to setting, iCloud, account, and try to click on the Apple ID, it is greyed out.  Is it possible to change the iCloud account once set up on iphone?

Answer 1

Yes - for those with this problem on the Mac, I fixed mine today. (Merry Christmas!)
1. My situation was interesting. I was logged into the App Store OK as me (you can do this despite the greying out if you go to the STORE menu in the App Store app). This meant that my "Purchases" not yet installed on this particular Macbook Pro were available to install. (It doesn't ask for the password again.) However, my "UPDATES" for software already installed brought up the sign-in dialog box with the previous user's account name greyed out (Admin IT people from my workplace).
2. The two available updates that this clearly affected were iMovie and iPhoto in my case. I therefore followed the advice here about removing the receipt identifying the previous 'purchaser' of these apps. Note: you do that via the PACKAGE of each affected application itself (using the finder) - see the instructions.
THAT FIXED IT.
3. I don't know if this is relevant, but just in case: my Mac had a separate account for our IT dept called 'Administrator'. In System Preferences under USERS & GROUPS, I selected that account and changed its Apple ID (in fact none was set at all - so it might not have been relevant) to my own Apple ID. (No password required here, so not risky on its own I think.) I don't know that this was relevant, and once I had done step 2 above (which I actually did after this one) I simply deleted my ID again from that Administrator account.
Good luck!