If you want to transfer your contacts from the iPhone to your SIM card, you will look in vain for a possibility. Because Apple has not provided such a feature. But there is an option with which you can save your contacts and, if necessary, transfer them to another smartphone without using the SIM.
But why can't you save contacts on your SIM?
The iPhone doesn't store this type of data on your SIM card because it isn't actually required. Older phones allowed you to store data on the SIM card because there wasn't a simple, standard method of backing up or transferring data to new phones. But iPhone has two simple and reliable backup options: it creates a backup every time you connect it to your computer, and you can save your data to iCloud.
In addition, Apple does not want users to save their data on removable drives which are easily lost or damaged. Therefore, for example, you cannot use SD cards with Apple devices..
Now to find out how you can export your iPhone contacts and thus transfer them to other smartphones, read through our post on this topic. In this way, you are guaranteed to switch to a new device without having to do without your contacts.
