You can't use a GSM only phone with Sprint or Verizon. CDMA is slowly fading away. As Sprint and Verizon continue to deploy LTE (which is a GSM based technology) and add VoLTE (Voice over LTE) on top, they'll eventually sunset the CDMA portion of their networks and have an LTE and 5G based network only..
Likewise, will a GSM phone work on Sprint?
Be sure this unlocked phone is a part of the CDMA network or it won't work with Sprint. Many phones that use traditional SIM cards are part of the GSM network, which includes AT&T, Cingular, and T-Mobile. These types of phones will not work on the Sprint network.
Also Know, how can I use an unlocked phone with Sprint? You'll need to make sure your device is unlocked in order to bring it to Sprint.
- Contact your current carrier to get an unlock code* Verizon AT&T T-Mobile.
- Enter the code on your current device to unlock.
- Visit and we'll help you finish bringing your device to Sprint.
Considering this, what phones are compatible with Sprint?
Most cell phones are compatible on Sprint, including:
- Apple iPhone 6, 6s and 6 Plus.
- Apple iPhone 7, 7 Plus, 8, 8 Plus and X (from Verizon only)
- Google Pixel (including XL, 2, and XL 2)
- Moto e4 and e4 plus.
- Samsung Galaxy S8 and S8+ (from Verizon, AT&T and T-Mobile only)
Is Sprint a GSM?
In the US, Sprint, Verizon, and US Cellular use CDMA. AT&T and T-Mobile use GSM. Most of the rest of the world uses GSM. The global spread of GSM came about because in 1987, Europe mandated the technology by law, and because GSM comes from an industry consortium.
Related Question Answers
How do you switch SIM cards on Sprint?
In order to swap SIMs, you have to call Sprint customer service and have them pair your new device's IMEI to the old SIM number. Even if you do that, chances are that customer service won't be able to perform this task if the old and new devices require SIMs of different SKUs.Can I put my Sprint SIM card in an unlocked phone?
A domestic SIM unlock allows you to insert a Sprint SIM card into your device and attempt to activate it on the Sprint network. Unlocking your device will not necessarily make it interoperable with the Sprint network. Unlocking your Apple device will not necessarily make it interoperable with the Sprint Network.Will Sprint accept unlocked phones?
NOTE: Not all devices are capable of having the SIM slot unlocked. Sprint will only activate devices certified to work on the Sprint network. Sprint cannot unlock phones from other carriers.How do I know if my phone is CDMA or GSM?
Check your phone's "About" settings. If you see an MEID or an ESN category, your phone requires CDMA; if you see an IMEI category, your phone is GSM. If you see both (e.g., Verizon phones), your phone supports both CDMA and GSM, and may be either one.Will my Sprint SIM card work in another phone?
If the SIM card and phone serial number don't match, the phone simply won't work. The SIM card won't work in other phones, and the phone won't work with other SIM cards. T-Mobile and AT&T use GSM, while Verizon and Sprint use CDMA.What network does Sprint use?
In the US, Sprint, Verizon, and US Cellular use CDMA. AT&T and T-Mobile use GSM. Most of the rest of the world uses GSM. The global spread of GSM came about because in 1987, Europe mandated the technology by law, and because GSM comes from an industry consortium.Can I put any SIM card in an unlocked phone?
Having an unlocked phone means that you can use any SIM inside, rather than be confined to using your phone solely with one carrier. Some handsets are sold unlocked and others will be locked to particular network.How much does a SIM card cost Sprint?
If you call Customer Care and request a SIM card, I'm pretty sure they'll charge you $15 because they'll send one of the SIM card kits. Corporate location SIM pricing. Replacement SIM cards are $0 and BYOD SIM kits ring out as $2.99. It depends on if the store is COR or a dealer.Can Sprint store Unlock iPhone?
Once you meet the requirements outlined in the Unlock Policy, Sprint will automatically unlock your active eligible SIM unlock-capable device. Sprint Forward customers must contact Customer Care at 855-639-4644 to request their device be unlocked.Can I use an AT&T phone on Sprint?
Can I use my AT&T phone with another carrier? Yes. AT&T uses GSM and so does T-Mobile. But if you're hoping to switch to Sprint or Verizon, both companies use CDMA technology, so you'll have to check if your device will work with those networks first.How much does it cost to unlock a phone from Sprint?
However, the Sprint USA network IMEI Network Unlock services are not reliable. They are staying online only for a few days and their cost is enormous (They start from $120 and they can go up to $190).How do I know if my phone is compatible with Sprint?
To check whether your cell phone is compatible with Sprint, find your IMEI number then enter it on the Sprint website. Sprint will confirm whether or not you can use your cell phone with their SIM card. Note that your phone will need to be compatible with the Sprint network as well as unlocked.Can I use a boost phone on Sprint?
If you have a Boost Mobile phone and want to switch to Sprint, you're in luck! As long as your Boost Mobile phone has been unlocked, you'll be able to use it with a Sprint SIM card since Boost Mobile runs off the Sprint network already. All you need to do is make sure: Your cell phone is unlocked.How long does Sprint take to unlock a phone?
(Newer phones from Sprint will see their SIM slots automatically unlock when they are eligible.) Carriers have two days after receiving an unlock request to get back to the customer. 
