It would be more possible with LTE- capacity devices and the later models of the Apple iPhones. While there is no guarantee, you might be able to bring over your Sprint phone to the GSM based networks such as T-Mobile and AT&T. Switching Over From Sprint To AT&T or T-Mobile Reasons they would provide include the spectrum bands that don’t work well together and many others. Verizon would most likely require that you purchase a new Verizon smartphone to use on their network. Sadly, taking your Sprint device over to the Verizon Wireless network is almost impossible. Your current Sprint device would work on plans on many MVNO such as Ting, US Mobile, Tello, and many other carriers. If you already have a Sprint phone but need to switch to a cheaper plan, there are many plans that might be right for you. You can compare carriers with GSM plans or CDMA plans at Wirefly. If that is the case, you may not be able to use the 2G and 3G services for your calls and messages. Older phones might use the SIM card only for their LTE services. However, this depends on how each specific model of the cell phone is designed.
This means that the newer Verizon and Sprint LTE enabled handsets have a SIM card included, and may work on all GSM networks. All LTE networks in the US are built on GSM technology. The recent launch of LTE networks by all operators has made things a little easier. This is how it would work with T-Mobile and AT&T. Now you can keep your device and enjoy your new network. All you need to do is have the phone unlocked, take out the old card, and swap it with the new card from your new network. It is easy to move from one network to another and keep your device with a SIM card. It would need some specialist reprogramming if you want to move out and switch your network.
CDMA technology embeds electronic serial numbers into each device to identify their separate subscribers. GSM networks use SIM card that can be removed to distinguish their subscribers within their network. Verizon and Sprint use CDMA technology on their network, and AT&T and T-Mobile’s network use GSM technology. Both types of technology are completely different and not compatible with one another at all. The cell networks in US either use the CDMA or GSM technology. Once you read on below and learn what's possible, compare cell phone plans at Wirefly to find the best plan for your needs.
Before we address this concern, let’s first quickly review on what CDMA and GSM technologies are and why these are important to decide which phones can move across networks. For current Sprint and Verizon customers, this could be a confusing question to answer. Many always wonder if they can keep their devices and move to other networks. Let’s see below how you can let go of your current carrier and switch networks while you still keep your old device. You love the phone you got from Verizon or Sprint, but you need to change your network.