That SIM card and it's unique serial number ... Those CDMA-compatible phones were built specifically to use those carrier's networks, ... With LTE being built off of GSM and HSPA standards, ...

GSM works by using data in SIM card to send and receive texts, make and receive calls, or access cellular data. In general, you must have a GSM device in order to access the data stored in the SIM ...

You may have an unlocked GSM phone that uses a micro-SIM card. ... Straight Talk's SIM cards are not compatible with the $30 All Your Need Plan. For this plan, ...

As GSM phones are compatible with any operator, who provides the SIM card which enables connectivity to the network. This makes the phone independent of the operator. N Narayanan, Bangalore End of ...

Check out our guide for a closer look at the two popular wireless standards, CDMA and GSM. They're becoming a bit less relevant in the face of LTE, 4G, and 5G.

The long and contentious battle for the exact shape of the nano-SIM / Fourth Form Factor (4FF) technically came to a close on June 1st. However, the standards body behind the decision, the ETSI ...

OnePIN Inc. may be the most far-reaching mobile social networking technology maker that you’ve never heard of. Since it started shipping product in 2007, Westborough-based OnePIN has deployed ...

If you're interested in getting in on Google's Project Fi cellular service but don't want to buy a Fi-compatible phone, here's how to get Project Fi service on any GSM-compatible device.