I am using XCode and was trying some apps using iPad Air, iPad Pro, iPhone SE, etc, and when I tried another iPhone, it said the number of maximum devices have been reached and gave an error.
How would we delete a device and let another device be used?
When I sign in ( with paid one) I can remove devices like below.
After sign in developer account follow: Certificates, Identifiers & Profiles > Devices finally choose the device which you remove and click disable button. It will be removed.
By the way there are limited number devices which can be added as you said in devices as well as same for certificates.
Apple says : "If you are the Account Holder, you can reset your list of development devices each year using Certificates, Identifiers & Profiles. You can register up to 100 of each device type for testing and Ad Hoc distribution per membership year. At the start of your new membership year, Account Holders, Admins, and App Managers will be presented with the option to remove listed devices and restore the available device count to 100 when first signing in to Certificates, Identifiers & Profiles.
Although you may remove a device from your account during the year, it will continue to count against your device limit. When resetting your list, make sure to remove all devices you no longer use for development before adding any new devices."
Note : There isn`t specific information for free accounts or device limitation as far as i search Apple documents. To erase your device from an account permanently : https://support.apple.com/en-us/HT201274
