HT204053 How do I have my wife's iphone 4s upload pics to the same icloud used for my ipad and iphone? Phone does not allow changing icloud ID once established.
I can tell you how to do this but first wanted to be sure that's what you want to do. You would then be sharing the same iCloud account and any synced data (contacts, calendars, etc.) would then be merged and the merge data would appear on her phone and your iPad (i.e., you'll end up with each other's contacts on your phone). You would also both be backing up your devices to the same account, sharing the 5GB of free storage (assuming you're both backing up to iCloud).
There's an alternative setup that would allow her to set up your iCloud account on her phone as her primary account and just turn on photo stream in that account (allowing your to share you photo stream), then set up a secondary iCloud account on her phone that would sync her Mail, Notes, Contacts, Calendars and Reminders. She would still have to back up her phone to your account, as well as syncing Safari, Documents and Find My iPhone (all of which can only be done in the primary account). Also, her mail would be fetch, not push as push email is only supported in the primary account.
I suppose a third option is to leave things as they are and share you photos with each other using shared photo streams.
Let me know what you want to do and I'll give you the steps.