Q: How to replace an old apple id with a new id on iphone 4s?

CHANGING APPLE ID/EDIT ACCOUNT INFORMATION/CHANGE ITUNES COUNTRY

Tap Settings / iTunes & App Stores, then tap the Apple ID signed in. Sign out of the current Apple ID account and then sign in with another account or create a new Apple ID http://support.apple.com/kb/HT2731?viewlocale=en_US

Go to settings/facetime and tap the ID there and log out and log in with new ID.

Go to settings/messages and turn off imessages wait 30 seconds and turn it back on, go to “receive messages  at” tap on the ID there, sign out and sign in with new ID.

Go to settings/icloud and delete the account and when prompted select “keep information on your device” then turn it back on with the new ID.

To edit account information tap Settings / iTunes & App Stores / Apple ID: / View Apple ID

To change your iTunes Store country, sign in to the account for the iTunes Store region you would like to use, tap Settings/iTunes & App Store/Apple ID/View Apple ID/Country/Region

Read this article for information http://support.apple.com/kb/HT1311

Anything Downloaded with a Particular Apple ID is tied to that Apple ID and Cannot be Merged or Transferred to a Different Apple ID

ricelle wrote:

 

I have an old apple id which i want to replace with a new one. Is it possible to copy all my settings and downloads from the old id to the new id?

No.

See Here   http://support.apple.com/kb/HE37

I have multiple Apple IDs. Is there a way for me to merge them into a single Apple ID?

Apple IDs cannot be merged. You should use your preferred Apple ID from now on, but you can still access your purchased items such as music, movies, or software using your other Apple IDs