No, that's not a typo. Customers are reporting SIM card failures across all carriers, including CDMA-based Verizon and Sprint, which actually use the micro SIMs included in the iPhone 4S to roam on ...

Pay-as-you-go cell phone provider Straight Talk employs SIM cards, allowing you to use your own unlocked GSM or CDMA phone on the network or purchase one of the phones that the company offers directly ...

Wondering what GSM Unlocked means? This short article will make it clear for you so read on. What does GSM unlocked mean? GSM stands for Global System for Mobile communications. It is one of the two ...

Following Apple’s media event in San Francisco this afternoon to reveal the new iPhone 5 and a slew of other products, the company began detailing devices further on its website. According to Apple’s ...

The teardown kings at iFixit have discovered that Apple’s new Verizon CDMA iPhone has a Qualcomm dual-mode GSM/CDMA chip under the hood. That means, as iFixit notes, “Apple could have supported GSM” ...

After you purchase and use your cellphone for an extended period of time, you can change networks. However, the phone that you're currently using may not be offered on that network. If you wish to ...

Teardowns of the soon-to-be-released Verizon iPhone 4 shows promising signs that a “world phone” iPhone could soon be on the way. The giveaway is Apple’s use of a Qualcomm chip that is both GSM- and ...

Several MacRumors readers have forwarded us a "member only" email from Ideal-case.com claiming to show the antenna band for what would seem to be the "iPhone 4S" based on the current iPhone 4 design.

Have you ever wondered exactly how a SIM card works? We’ll help you understand why your phone needs one and what they do to keep you connected. Image: TalkAndroid Editorial Note: Talk Android may ...