Taking Your iPhone X International
Different countries employ different radios and frequencies, and Apple has managed to cram a bunch of radios into the iPhone X. So, if you’re planning a vacation abroad, the iPhone X has you covered.
Suffice it to say, your iPhone can handle the fastest modern networks. These include versions of speedy LTE (Long Term Evolution) networks. LTE, a 4G (fourth-generation) communications standard, handles data rather than voice calls. Verizon Wireless was the early LTE leader, though the other major U.S. carriers are now very much in the game. The iPhone can tap into faster LTE networks and support Voice over LTE (VoLTE) technology, for high-quality wideband calls.
When you’re cruising along at LTE speeds, you’ll see the little LTE indicator in the upper-right corner of the status bar. But just to confuse you, you might see a tiny 4G indicator instead of LTE when you’re cruising a fast but slightly slower cellular network.
Be aware that sometimes your carrier lets you down, with dropped or less than pristine quality calls. More often than not, however, the quality of voice calls on the iPhone X is good.
When you’re abroad, your carrier must turn on something called international roaming (unless, of course, you live in a foreign land and have a local carrier). Consult your carrier for the latest international rates. If you’re calling the United States while overseas, you can take advantage of Dial Assist. This feature automatically adds the proper prefix to U.S. numbers dialed from abroad. Tap Settings →Phone → Dial Assist. You’ll know this virtual switch is turned on when green is visible rather than gray.
If you have no phone service, you’ll see a message that says Visual Voicemail is currently unavailable.