There is no such thing as a CDMA SIM card.CDMA is a technology which doesnt use SIM cards.And WCDMA is evolved from gsm and uses SIM cards for 3g.
You cannot use a WCDMA phone on a CDMA network. Wideband Code Division Multiple Access (WCDMA), despite its name, is different from and not part of Code Division Multiple Access (CDMA) networks. WCDMA is one type of 3G technology and is an extension of Global System for Mobile Communications (GSM) networks.
a phone with these two facility can work in GSM with sim card and can work without sim card in cdma mode
There is no such thing as a CDMA SIM card, since CDMA phones do not use SIM cards.
CDMA and GSM are Radio technologies and mobile Phone is just an Antenna to receive these Radio Signals. Since both the technologies work on different frequency range and has different modulation shemes therfore the mobile phones for both are different.Apart from this 3G tehchnology which is combination of both GSM and CDMA (WCDMA) is compatible with both GSM and CDMA. So a 3G mobile can serve for both GSM and CDMA radio signals.SIM (Subcriber Idendity Module) is consists of Credential for network authorization. Since Both GSM and CDMA technologies has different Authorization functions and parameters hence both SIMs are different. Note: In CDMA technology SIM is often called as RUIM (Removable User Idendity Module).CDMA uses Different Frequencies than GSM. CDMA also does not require a SIM card.Now some companies do provide SIM cards for CDMA connections also, such as Reliance communications and TATA Indicomm in India.CDMA can hold more calls per channel on their towers, while GSM drops alot of calls. That is why people are always complaining about T-Mobile and At&t dropped calls. GSM is used internationally while CDMA is mostly used in the domestic United States. CDMA carriers are Verizon, Alltel, Sprint, Cricket....while GSM carriers here in the U.S. are T-Mobile and At&t.
No, You cannot use reliance CDMA sim card (or) any other CDMA card sim card on Apple iphone 4s. Any GSM Sim card will work on factory unlocked Apple iphone 4s but not CDMA sim ONLY IN INDIA.
No you cannot. Although there are some phones that support CDMA aswell as GSM.
Virgin Mobile uses CDMA, so their phones do not take SIM cards.
No. Because Sprint is CDMA and T-Mobile is GSM. Sprint = No SIM. T-Mobile = SIM.
yes...absolutely CDMA phones only allow certain sim....and tata indicom is one of them people usually take CDMA phone for tata indicom and its converse is also true
The full form of SIM is Subscriber's Identity Module. The SIM card is used into mobile phones to make calls, send messages, use internet. There are two types of SIM card. One is GSM and another is CDMA. The full form of GSM is Global System for Mobile communication. The full form of CDMA is Code Division Multiple Access. The CDMA Technology is superior than GSM.
No...US Cellular is a CDMA and T Mobile is GSM. Incompatible.
NO, iphone 4 from verizon does not have SIM CARD its CDMA its a NO!