For big providers, this leaves only AT&T or T-Mobile. There are few options in the GSM market as Verizon and Sprint use CDMA, a different type of mobile technology.

GSM phones can be used on other GSM networks, making roaming easier. What does this mean for end-users? CDMA phones are tied with the provider If your SIM card slot is unlocked, you can’t change providers within the same country. More than 210 countries support GSM technology, including Europe. The key differences between these two technologies are their security features, global reach, and LTE data speeds.ĬDMA is used almost exclusively in the USA today, with a small portion of it being used in Japan and Canada. It is important to understand the differences between CDMA and GSM, especially for the US market in telecommunications. If you are going to spend extra on a service, you will want the best. If you are only visiting the country for a short time, there may be other expenses that you have already planned. It’s well-known that the USA is more expensive than other countries for telecommunications.

This will allow them to save tons of money on data and calls. Customers are advised to obtain a prepaid SIM card before they travel to the USA. Your carrier may charge you a lot for your non-American SIM card if you travel to the U.S. The Best Prepaid SIM Card USA With No Restrictions

Verizon prepaid sim card