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.
Dropped and Missed CallsAccording to Cellular News, call quality problems, including dropped calls and missed calls are common problems with GSM technology. These problems result directly from the technology in use. GSM technology cannot accommodate as many callers on a single cell tower as the more modern CDMA technology. This means that callers in areas where there are not a preponderance of cell towers may find that the call problems on GSM will be more common.Security IssuesZDNet UK reports that GSM has a serious security flaw, demonstrated by a hacker who was able to intercept phone calls from a number of GSM-based cellular phones. The problem is based directly on the technology according to this hacker and his solution was to "turn off" the GSM technology (only the older 2G technology though) that is commonly used by people all over the world. The problem is largely mitigated however by the use of the more modern 3G technology that is commonly used (as of November, 2010) on many GSM phones.EfficiencyAnother problem with GSM is a network problem rather than a consumer problem, though it is a consumer problem for those who don't want to see a proliferation of cellular towers. As previously noted, GSM technology can handle fewer callers on a single cellular tower. Therefore, networks who work with GSM must find ever more areas to built GSM cellular towers, causing them to have problems with costs and locations. By the same token, some consumers who prefer not to see a proliferation of cellular towers consider this a problem because the cellular towers must be placed in more and more urban areas, potentially spreading more radiation and causing what some consider a blight on the landscape.
The answer is "Yes, but carriers don't like it." There is no technical reason why you would not be able to use a CDMA phone on any CDMA network, but in order to ensure that they make money, carriers will only allow ESNs (serial numbers) from their own phones to be activated. The exception is (or rather, will be) Verizon Wireless when they institute their Open Access Policy. This will allow you to use any CDMA phone on their network.
It is a wireless card that operates off of AT&T's wireless edge network
I don't believe that Boost Mobile has Towels in any state :) and for that matter, they have no towers, either, they leech off of Sprint's crappy network. In that case, yes sprint does have a few towers in Mississippi.
GSM stands for Global System for Mobile, while CDMA stands for Code Division Multiple Access. GSM uses SIM cards which store the phone number and information and runs off of Towers and requires more steps to connect a call, which results in poor call quality. CDMA goes through calls much quicker, and it can penetrate buildings better than GSM.
A Mac's airport card connects the Mac to a wireless network. If the Mac is turned off it will not be connected to the network.
From your Playstation Network connection on a PS3 you only need money in your Playstation Wallet from a credit card matching your account or a Playstation Network Card to make a purchase and download it into your PS3 harddrive
You can - provided either the new phone is unlocked (not tied to a specific network) or both phones are on the same network.
Yes, The EBT card can be used anywhere in the US regardless of where it was issued. It runs off the Quest network and can be used anywhere where the merchant accept the Quest network. *I used a California EBT card in Georgia and Florida*
So long as the phone is GSM and validates with your SIM card, it should work. If in question, do not buy.
No, sleep mode shuts down most all hardware components (CPU, graphics card, NIC (network card), VDU) to preserve as much power as possible without losing your current computer session by keeping the ram turned on. In turn, the driver that powers your network card is off, the CPU that processes the data is off, and the hard drive that it saves to is off.