Cdma what is

CDMA networks layer digitalized calls over one another, assigning unique codes to differentiate between them. Every call data is encoded with a different key, and the calls are then transmitted at the same time. The receivers each have the unique key as well, to split the combined signal into its individual calls.

Both are multiple access standards, which means that multiple calls can go through a single tower, but as you can see, the major difference between the two has to do with the way your data is converted into the radio waves that your phone broadcasts and receives. There are, of course, more practical considerations that matter more for us as a consumer, which you can find listed below:. With the move towards 5G , the choice between GSM and CDMA becomes even less relevant, as voice call technologies increasingly moved over to data network brands.

Today, the argument is only a consideration as 2G and 3G networks are still used at the backbone of network voice technologies. Eventually, these bands will be repurposed and networks will move away from this older voice technology.

Unless international roaming is a factor, as far as your voice call and 3G data needs are concerned, both GSM and CDMA networks are equally good, with factors like availability, coverage, customer service, and price, more at play here. The distinction is becoming less important and will be entirely irrelevant sooner rather than later more on that below. Different carriers have different timelines for this, but Verizon is taking concrete steps to begin transitioning CDMA devices off of the network at the end of — eventually moving all devices to the HD Voice LTE network.

This has implications for people with older phones who want to switch carriers. They will also no longer be able to provide such a device to activate on an existing line or swap one such device for another. However, customers with these devices will still be able to suspend and resume service, change their phone number, upgrade to compatible 4G or 5G devices and activate new lines for 4G or 5G devices. While the CDMA network will remain available as-is until that date, any service requests related to CDMA devices may receive limited support after the end of Customers are encouraged to upgrade to newer technology.

Watch for these technologies to be gradually phased out and for connectivity to improve. Popular Articles Quad what and octa who? A quick guide to processor lingo. Android Lollipop: Our favorite features.

Best Satellite Internet Providers. Get Faster Satellite Internet. How Does Fiber Internet Work? You paid cold hard cash or at least cold hard credit for that new phone, which means you should be able to take it with you to a new carrier , right?

While most phones sold across the world are GSM phones, there are some notable exceptions. But first, what the heck is going on with all these capital letters? Those are just fancy ways of describing two forms of radio technology that phones and phone networks use to transmit voice and data. However, with the widespread adoption of 4G LTE networks, this has changed. The GSM vs. Check out the best deals on new devices this week. However, as mentioned above, if you have a newer phone, like a Galaxy S20 or even an iPhone 6s , it will often be compatible with all three technologies as long as it is unlocked.

T-Mobile has gobbled up Sprint in a merger , meaning that the two networks will eventually merge. If you bought your phone from your carrier, then that can usually tell you what kind of technology it uses. Verizon uses CDMA technology in its networks, but usually sells phones that are equipped with both technologies.

It would be nice if your phone just said what kind of technology it used on the back, next to the model number.

If you see both, then your device supports both technologies lucky you! You can use those same About settings to find your model number on both iPhone and Android devices. Model numbers are also often printed on the back of your phone. There used to be a really easy way to determine what kind phone you had: just see if it has a SIM card slot. By signing up, you agree to our Terms of Use and Privacy Policy. As 5G networks are rolling out, carriers are beginning to shutter their old 2G and 3G networks.

These phones typically require a SIM card to stay connected to that network. Vivint Smart Home Security Review. Disclaimer : The information featured in this article is based on our best estimates of pricing, package details, contract stipulations, and service available at the time of writing.

This is not a guarantee. All information is subject to change. For the most accurate information, please ask your customer service representative.