Title: Can I Use My iPhone in Europe? | 10Best
Headings: Can I Use My iPhone in Europe?
Can I Use My iPhone in Europe?
Keep connected on your Euro trip
Buying a European SIM card
GSM vs. CDMA phones
Unlocking a phone
Using a European SIM card
International roaming with a U.S. carrier

Content: Unlocking a phone
To further complicate things, many American carriers "lock" their phones to prevent users from swapping out their services for a cheaper SIM package. Users can unlock their phones through their carrier or via a third party, but if they do so before their contract with the carrier is up, it can void the phone's warranty. Once the phone is unlocked, a new SIM card should slip right in and work like a charm. If a smartphone isn't eligible to be unlocked by its U.S. carrier and its owner doesn't want to go through a third party and jeopardize the warranty, he can pick up a cheap SIM-card compatible smartphone specifically for the trip. Retailers like Walmart and Target sell them. Using a European SIM card
A new SIM card means a new phone number, so most travelers who go this route opt to download messaging apps to simplify that situation. WhatsApp, which uses a data connection to place phone calls and send texts, is the most popular option for European travelers. International roaming with a U.S. carrier
Most U.S. mobile carriers offer their own travel packages, which are usually more expensive than the SIM option but also allow travelers to keep their own phone numbers and simplify the overall travel process. Here are each major carrier's travel options: AT&T: