Updating roaming on verizon
When you travel outside this coverage area, you're roaming. If you're a Verizon customer, understand the carrier's roaming policy to prevent surprise roaming charges, especially if you travel outside the United States.
If you use your phone while traveling abroad, it can take some time for the carriers you used overseas to tell Verizon that you owe roaming charges.
You can update the Preferred Roaming List on your Sprint i Phone by dialing ##873283# on your device.
A message will appear on the device that the process has started and you will received a notification once complete.
Sometimes these carrier updates can even add new features to your i Phone, for example, a recent carrier settings update available to many i Phones on US cell providers offered the ability to change the data connection from LTE, 3G, or Edge, a feature that was made possible with an i OS update, but had to be specifically allowed by the carrier as well.PRL updates are meant for CDMA networks, and both T-Mobile and AT&T utilize GSM networks.