Iphone gsm什麼意思

"GSM" stands for Global System for Mobile communications, which is a standard for mobile telecommunications that was widely used in many countries around the world, including Europe, Asia, and Africa. GSM technology is used for both voice and data services on mobile phones, and it allows for roaming between different networks.

When you see "iPhone GSM" or "GSM iPhone," it typically means that the iPhone model in question is designed to work on GSM networks. GSM networks use a subscriber identity module (SIM) card to identify users, and they are known for their ability to offer nationwide coverage and international roaming.

In the context of iPhones, GSM models were particularly important in the early days of the iPhone, as the first iPhones were only compatible with GSM networks. However, as technology evolved, iPhones began to support both GSM and CDMA (Code Division Multiple Access) networks, which are the other major standard for mobile communications in the United States and some other countries.

Today, most modern iPhones support both GSM and CDMA networks, so the distinction between GSM and CDMA iPhones is less relevant. However, if you are buying a used iPhone or trying to determine compatibility with a specific carrier, it's still important to know whether the iPhone is GSM or CDMA. You can usually find this information in the iPhone's specifications or by looking at the model number.