1 Buy an International SIM
If you’d prefer, you can also purchase local SIM cards in the country (or countries) that you are visiting. These are available from local phone carriers in the country that you are visiting.
However, in order to use one of these international SIM cards, you need to be sure that your device is unlocked. If your device is locked in to a specific mobile carrier, you will need to contact your carrier and submit a request for an unlock. Check with Apple to see if your carrier offers unlocking.
Note: before replacing your SIM card, be sure to backup your iPhone.
Once your device is unlocked, open the SIM card tray (located on the side of your device) and replace the SIM card. Upon doing so, you will have to set up your iPhone again.
What are some best practices you adhere to when traveling abroad? Let us know in the comments!