The whole reason AT&T went after T-Mobile is that they both use GSM.

More American carriers are using GSM.

It was the first network using GSM in Brazil.

Later, a second system, C-com, was set up using GSM.

Basically I'm glad I'm over on Verizon with - and not using GSM.

We've made our own audio using GSM, and we've decrypted it, we've verified that we can do this.

These people were using GSM based cellular phone services in various parts of India and other Asian as well as African countries.

Almost two million people are now using GSM.

I'm not sure about it, but I think pretty much everyone in Europe uses GSM, so the Verizon iPhone doesn't need those European markings.

Yep, everyone in Europe uses GSM.