what does CDMA mean?
359090
Definition: CDMA, or Code Division Multiple Access, is a competing cell phone service technology to GSM, which is the world's most widely used cell phone standard. CDMA uses a "spread-spectrum" technique whereby electromagnetic energy is spread to allow for a signal with a wider bandwidth. This allows multiple people on multiple cell phones to be "multiplexed" over the same channel to share a bandwidth of frequencies. With CDMA technology, data and voice packets are separated using codes and then transmitted using a wide frequency range. Since more space is often allocated for data with CDMA, this standard became attractive for 3G high-speed mobile Internet use. The CDMA standard was originally designed by Qualcomm in the U.S. and is primarily used in the U.S. and portions of Asia by other carriers. Sprint, Virgin Mobile and Verizon Wireless use CDMA while T-Mobile and AT&T use GSM. While CDMA and GSM compete head on in terms of higher bandwidth speed (i.e. for surfing the mobile Web), GSM has more complete global coverage due to roaming and international roaming contracts. GSM technology tends to cover rural areas in the U.S. more completely than CDMA. Over time, CDMA won out over less advanced TDMA technology, which was incorporated into more advanced GSM.
2087345
No it will not work on CDMA. WCDMA stands for UMTS. eg 3G networks P.S. Well it might support 3G internet speeds if frequency match. Otherwise you will use the phone, but will get GPRS internet speed.
1598668
It is a quad band phone. it means it envelopes all the frequency currently existing in the cell world(for the gsm subscribers). thus if u have a gsm sim card u can enjoy this.
406759
Unlocked means that the device can be used on a different carrier with the same protocol...such as TMO and AT&T are gsm protocol and Verizon and Sprint are cdma protocol...sure hope tht cleared it up for you
1061574
yes.is GSM.It works anywhere in the world if this unlocked for any GSM network.NO works on CDMA network.
2220302
Sprint and Verizon are cdma network. Att t-mobile are gsm. iPhone 4s 5-5s are gsm phones that work on both cdma/gsm
928257
GSM, takes a SIM card (actually 2 SIM cards), will not work with CDMA which is a different and incompatible cell phone radio standard.
1786499
If you get one for Verizon or Sprint it will be CDMA but if you get one for AT&T or T-Mobile then it is a GSM
1786500
This iPhone is from at&t; and it's a gsm SIM card iPhone. Only verizon and sprint use cdma
1786498
If you get one for Verizon or Sprint it will be CDMA but if you get one for AT&T; or T-Mobile then it is a GSM
35734
This type of phone will work anywhere in the world,however you have to make sure you purchase the right phone for the type of network you intend to use it on. For CDMA you have to specify that you need that type of phone when you make the order.Gsm will not work on a network that DOES NOT use sim cards.
1942724
I think so. I live in an area that a sim card phone won't work. It doesn't say CDMA on the package or details. Goodluck
2132617
Wrong, cdma was used back when there was no such thing as sim cards, you can purchase this phone and since we sell them unlocked already any company will work. As long as you have a working sim card.
1704532
CDMA is used by such companies as sprint and verizon and GSM is used by AT&T and Tmobile. It's just different radio systems that are used in cell phones. For a complete list of which companies use CDMA or GSM go to the following site http://www.ebay.com/gds/GSM-and-CDMA-Guide-/10000000009189079/g.html
615717
Straight Talk uses GSM and CDMA Bands. Straight Talk phones contain a letter after the band to determine the network/towers it will use. ie. CDMA-V = Verizon; CDMA-S = Sprint; GSM-A = At&t; GSM-T = TMobile. For a CDMA phone from a source other than Straight Talk, there is a site that will allow you to enter the IMEI/Serial Number to determine if you can use the phone on their network by purchasing a Network Card. For GSM phones, a new SIM card may need to be purchased.
752019
gsm means it will work with att but not verizon Verizon uses CDMA. it may work as an international phone.
2066514
You can't take a CDMA phone and use it on GSM or vice versa. The technologies are incompatible.