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Cellular Phone Forum / Providers / ATT Wireless / April 2004Cingular phones taking attws sim cards
Got one of my buddies who works up at cingular to pop a couple of our attws sims in a V400 and another model. Guess what, they worked, read att wireless and could place calls. The reverse was not true, Anyone want to try and verify this. Looks like Cingular is not locking attws sims. > Got one of my buddies who works up at cingular to pop a couple of our attws > sims in a V400 and another model. Guess what, they worked, read att wireless > and could place calls. The reverse was not true, > > Anyone want to try and verify this. Looks like Cingular is not locking attws > sims. What has been posted many times is that Cingular sells unlocked phones, AT&T WS sells locked phones. > > Got one of my buddies who works up at cingular to pop a couple of our attws > > sims in a V400 and another model. Guess what, they worked, read att wireless [quoted text clipped - 5 lines] > What has been posted many times is that Cingular sells unlocked phones, > AT&T WS sells locked phones. oops, let me type something this time... that is one of the major set backs that is keeping me from getting the v600 from ATTWS. I will just have to wait until Cingular offers the v600 and I will buy it from them, and just put my ATTws sim in it. > > > Got one of my buddies who works up at cingular to pop a couple of our > attws [quoted text clipped - 8 lines] > > What has been posted many times is that Cingular sells unlocked phones, > > AT&T WS sells locked phones. Pardon my ignorance, even though I've been a cellular subscriber since 1989, but what is a SIM? --Mike > oops, let me type something this time... > [quoted text clipped - 16 lines] >> > What has been posted many times is that Cingular sells unlocked phones, >> > AT&T WS sells locked phones. A SIM is a Subscriber Identity Module. It is a chip card, about the size of a first class postage stamp. It is a key element in all GSM (Global System for Mobile) mobile phones - representing about 70 percent of the mobile handset market (fairly new to the US but is the standard in the rest of the world). A SIM is actually a tiny computer in your phone. It has memory (for data and applications), a processor and the ability to interact with the user. Current SIMs typically have 16 to 64 kb of memory, which provides plenty of room for storing hundreds of personal phone numbers, text messages and value-added services. Hope this helps. > Pardon my ignorance, even though I've been a cellular subscriber since 1989, > but what is a SIM? [quoted text clipped - 21 lines] > >> > What has been posted many times is that Cingular sells unlocked phones, > >> > AT&T WS sells locked phones. Thanks for the info guys! --Mike >A SIM is a Subscriber Identity Module. It is a chip card, about the size >of [quoted text clipped - 39 lines] > phones, >> >> > AT&T WS sells locked phones. >Pardon my ignorance, even though I've been a cellular subscriber since 1989, >but what is a SIM? Subscriber Information Module i.e. the "smart card" in GSM phones that holds subscriber information as well as holds your phone book entries (other than what your phone *may* hold.... some phones do not have internal phone memory and only have SIM memory to hold phonebook entries.) - - - - - - - - - - - - - - - - - - - - - - - - - - remove NONO from .NONOcom to reply SIM card in phones have only been around for a few years here in the US. TDMA and CDMA phones dont use them. > >Pardon my ignorance, even though I've been a cellular subscriber since 1989, > >but what is a SIM? [quoted text clipped - 7 lines] > - - - - - - - - - - - - - - - - - - - - - - - - - - > remove NONO from .NONOcom to reply >SIM card in phones have only been around for a few years here in the US. >TDMA and CDMA phones dont use them. Depends on what you mean by a "few." There have been GSM networks in the US as early as 1995. By my count that's 9 years ago. Hardly a few by most normal definitions. Now if you had said that GSM was not a popular mobile phone technology until a couple years ago you would be more correct (not totally correct, but more correct) since other technologies such as IS-136, CDMA and iDen required you to program a phone rather than have a subscriber information module as is used in GSM and in the newe iDen phones. CDMA has R-UIM which is very similar to a SIM, but AFAIK no North American CDMA operator implements it (it would give too much freedom to their subscribers to get non-carrier provided equipment.) Probably if ATTWS and cingular could have figured out a way to make all their GSM subscribers get equipment only from them they would. - - - - - - - - - - - - - - - - - - - - - - - - - - remove NONO from .NONOcom to reply > >SIM card in phones have only been around for a few years here in the US. > >TDMA and CDMA phones dont use them. [quoted text clipped - 15 lines] > - - - - - - - - - - - - - - - - - - - - - - - - - - > remove NONO from .NONOcom to reply The last nine years are all blurred together anyways. I cant remember the chronological order of anything any more. However, GSM has really gained popularity in resent years and actually, just by looking at the coverage maps for ATTws GSM. I still have my coverage map from when I signed up, and the coverage has grown. Improved? I cant say, but it does cover more area. The v400 is shipped unlocked. I talked to the Cingular rep and he said they are shipped that way. That was one of the big selling points for my dad since he spends a lot of time in china and needs a quad band phone that can use a calling card sim. I have tried my ATTws sim in it with no trouble at all. > Got one of my buddies who works up at cingular to pop a couple of our attws > sims in a V400 and another model. Guess what, they worked, read att wireless > and could place calls. The reverse was not true, > > Anyone want to try and verify this. Looks like Cingular is not locking attws > sims. |
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