What is a "Portable Gsm"? The Most Authoritative Explanation.

Which carriers use GSM phones?

Both T-Mobile and AT&T use the GSM network, and therefore sell GSM-compatible phones. However, if you have a phone made in the last couple of years, you probably don't need to worry about which carriers use GSM or CDMA networks since most newer phones work on both networks.

What is a GSM phone?

GSM (pronounced gee-ess-em) is the most popular cell phone standard, and is used internationally, so you've probably heard about it in the context of GSM phones and GSM networks, especially when compared to CDMA. GSM originally stood for Groupe Spécial Mobile but now means Global System for Mobile communications.

What is a GSM unlocked phone?

A phone labeled as a GSM unlocked phone is a device that can work with any compatible mobile service provider. Unlike a locked phone, you don't have to purchase a contract with a specific cellular network for the phone. You can choose to activate the device with any GSM mobile carrier. What does 'GSM carrier' mean?

What are the advantages of GSM?

GSM also has the advantage of easily swappable SIM cards. GSM phones use the SIM card to store your (the subscriber's) information like your phone number and other data that proves you are in fact a subscriber to that carrier. This means you can put the SIM card into any GSM phone to instantly continue using it on...