Will I lose my data after signing into new Apple ID on iPhone?

levochka wrote:

I am planning to change my Apple ID, but I'm afraid, that I'm going to lose my data. Actually, I don't have I lot in my iCloud, except for some info saved by apps. So, will I lose something? What do I need to do to save my data? (iPhone 13 Pro Max, ios 15.4.1, if you need it)

Change your Apple ID - Apple Support

When changing to the new ID, there may be some data loss, but you can minimize it. If syncing photos with iCloud, ensure Optimization is turned off in Settings/Your Name/iCloud/Photos and/or in Photos/Preferences/iCloud. Then make sure full resolution photos are on the device/computer. When signing out of iCloud, if asked whether you want to retain data, choose yes. Messages conversations will be lost if they are addressed to the ID. See the article below for other places that the old ID should be removed. See Winston Churchill's response in the below discussion. If possible, also set up Family Sharing  between the IDs to keep access to your apps/purchases. 

 How to switch Apple IDs on your iPhone or iPad.      

How to transfer all files from one iCloud account to another.       

What to do after you change your Apple ID or password - Apple Support.      

Family Sharing.         

Family Sharing - Set up.        

You wont lose your data as they will ask if you want to backup your data.

sign into appleid.com and change your Apple ID there. You can change to a completely different email account and not loose anything. Give it time for the change to hit your devices.