In this short article, you will learn exactly how you can manually change your carrier on your iPhone with the latest iOS 15 (also applies to iOS 14). This is especially helpful for those who travel internationally and want to choose a specific carrier or those who live on a border of a country and want to prevent automatic mobile network switching to a roaming carrier, which can significantly increase your phone bill.
Where are the carrier settings on my iPhone? Why are they missing?
Since iOS12, Apple has decided to remove the carrier settings tab on your iPhone. However, you can still manually change your carrier for when you are traveling internationally or in case you want to prevent automatic carrier switching by following these steps.
How do I manually select a carrier on my iPhone? How to turn off the automatic carrier selection on my iPhone?
To manually select a different carrier/mobile network on your iPhone with iOS 14 or newer, you need to turn off the automatic carrier switching option. You can do this by going to Settings -> Mobile Data -> select the desired phone number in the DATA PLANS section -> Network Selection -> turn off Automatic network selection. Now you should see a list of available mobile carriers you can choose from.