does a CDMA mobile phone has a SIM card??

Question

does a CDMA mobile phone has a SIM card?? i'm just curious. because on GSM network, its very easy to switch phones. just get the SIM card and insert it in a new phone. does it work the same way in a CDMA network??

Answer 1

In some parts of Asia CDMA phones have SIM cards, but in the US, none of the CDMA carriers (e.g., Verizon, Sprint) use this approach, only the GSM carriers (e.g., Cingular, T-Mobile) use this approach.

Hope this helps. :O)

Answer 2

Simple answer no!

Complex!

CDMA takes an entirely different approach from TDMA. CDMA, after digitizing data, spreads it out over the entire available bandwidth. Multiple calls are overlaid on each other on the channel, with each assigned a unique sequence code. CDMA is a form of spread spectrum, which simply means that data is sent in small pieces over a number of the discrete frequencies available for use at any time in the specified range.


In CDMA, each phone's data has a unique code.

All of the users transmit in the same wide-band chunk of spectrum. Each user's signal is spread over the entire bandwidth by a unique spreading code. At the receiver, that same unique code is used to recover the signal. Because CDMA systems need to put an accurate time-stamp on each piece of a signal, it references the GPS system for this information. Between eight and 10 separate calls can be carried in the same channel space as one analog AMPS call. CDMA technology is the basis for Interim Standard 95 (IS-95) and operates in both the 800-MHz and 1900-MHz frequency bands.

Ideally, TDMA and CDMA are transparent to each other. In practice, high-power CDMA signals raise the noise floor for TDMA receivers, and high-power TDMA signals can cause overloading and jamming of CDMA receivers.

Theres more at below!

Awesome question!

Answer 3

No. CDMA technology is completely different then GSM/TDMA.

Without getting into how the technologies differ:

CDMA phones use the phones ESN number to identify it on the network.

Answer 4

No. SIM cards are only for GSM standards.