Maximum number free account has been activated on iPhone

"The maximum number of free accounts have been activated on this iPhone." is discussed in this support article -->

'If you see a Could Not Create Apple ID or Could Not Set Up iCloud message', click on this link --> https://support.apple.com/HT210743

This message generally "means that you have exceeded the number of new Apple IDs you can set up with iCloud on a single device in one year." See the recommendation in the link on alternative methods for setting up iCloud accounts, e.g. on a computer.

We would like to help. Please rephrase your question what do you mean by "Maximum number free account has been activated on iPhone" And what are you trying to do when getting these messages / errors?