[Q] CDMA SIM card possible? - Droid 2 Global General

I have an unlocked D2G,
it's fine with GSM sim cards, but I wonder if it can use other CDMA/WCDMA SIM cards?

There are no CDMA SIM cards. They're called RUIM cards. The D2G does not support RUIM cards.
WCDMA is GSM.

Gasai Yuno said:
There are no CDMA SIM cards. They're called RUIM cards. The D2G does not support RUIM cards.
WCDMA is GSM.
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I think there are CDMA SIMs.
The Asia Pacific Telecom (Taiwan) uses CDMA2000, and they use SIM cards.
Because I would like to switch to it, I need to know if D2G support CDMA SIMs or not.

tennyleaz said:
I think there are CDMA SIMs.
The Asia Pacific Telecom (Taiwan) uses CDMA2000, and they use SIM cards.
Because I would like to switch to it, I need to know if D2G support CDMA SIMs or not.
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Repeating. Because apparently you don't understand what you are talking about.
The D2G only supports USIM. USIM is Universal Subscriber Identity Module; it's a piece of software that runs inside the UICC (Universal Integrated Circuit Card).
USIM is stored on the UICC cards made for GSM.
CSIM (CDMA Subscriber Identity Module) is stored on the UICC cards made for CDMA. The previous generation of hardware (smartcards) used for this purpose is called RUIM.
CDMA carriers that use UICC/RUIM cards do not support USIM, only CSIM. It's impossible to use pure USIM cards with CDMA due to the differences in USIM and CSIM software. Vice versa, pure CSIM cards cannot be used with GSM.
Although an UICC can include both CSIM and USIM, the D2G does not support CSIM and RUIM. It only supports USIM on UICC.
Please re-read this again in case you still want to ask if it supports “CDMA SIM cards”.

Related

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How to use CDMA card on SIM card in the position, how to make 6875 support both GSM and CDMA support card
have anyone?
could you be a bit more clearer...what exactly are you asking? do you want to run gsm and cdma at the same time?
I want to use uim card to run cdma
are you located in india?
no ,I come from china

[Q] GSM SIM to R-UIM is it possible?

I am interested to know if it is possible to copy the contents of a carrier GSM sim to an R-UIM card?
I have a CDMA phone with GSM capabilities and accepts R-UIM cards. I would like to use it with a SIM but for obvious reasons the phone doesnt read SIM cards, only UIM standards.
I would like to know if there are any methods to copy the GSM sim application of a carrier SIM to the GSM portion of a UIM card.
I am by no means knowledgable on Smartcards so if this question is idiotic, please forgive me.

sim card-less mobile technology

Hi Guys,
I'm working on a school project to research on the possibilities of sim card-less mobile technology. I am looking at replacing the sim card with a mobile application that would be able to verify the user via a mobile application.
Understand that CDMA technology doesn't require a sim card, but it is not available in my country (Singapore). Thus would like to have a discussion here on whether sim card-less is possible for GSM handset?
As the world is going LTE/4G now, would the removal of sim card obstruct us from going forward towards the LTE/4G technology?
Appreciate your replies! Thanks a million!
woshiahhao said:
Thus would like to have a discussion here on whether sim card-less is possible for GSM handset?!
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An app could be malicious/malfunctioning and even not contain the true credentials to identify you as the true user of the contract with your service provider. Why do you think SIM cards are encrypted?
Not sure what you're trying to accomplish. To create an app to use your phone without a SIM? What's the purpose? Are you sure you're doing this for "school research"?
SecUpwN said:
An app could be malicious/malfunctioning and even not contain the true credentials to identify you as the true user of the contract with your service provider. Why do you think SIM cards are encrypted?
Not sure what you're trying to accomplish. To create an app to use your phone without a SIM? What's the purpose? Are you sure you're doing this for "school research"?
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Yeap, it's for a school project.
I've read that Verizon and Sprint phone uses CDMA and doesn't require SIM card. Is that true? How is the true user verified in that case?
woshiahhao said:
Yeap, it's for a school project.
I've read that Verizon and Sprint phone uses CDMA and doesn't require SIM card. Is that true? How is the true user verified in that case?
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Click to collapse
Verizon and Sprint non-LTE devices do not use SIM cards.
Traditionally, CDMA devices in the US do not use SIM cards (Verizon and Sprint are CDMA, AT&T and T-Mobile are GSM).
Each phone has a built in identifier (called an ESN [Electronic Subscriber Number] or MEID [Mobile Equipment Identifier]) on top of the IMEI number that every phone in the world has. The phone is programmed on the computer to connect to a certain network (the APN and such are already filled in and usually not user-accessible on the phone itself, unlike with GSM devices).
Instead of swapping a SIM card, a user will go onto the website of the provider into their account and put in the device's ESN number. The device then provisions itself (known as activation) and is on the user's account.
However, all networks in the US, both CDMA and GSM, use LTE now. LTE is a GSM technology and therefore requires a SIM card to authenticate the device on the network. So even CDMA networks require SIM cards because their devices are LTE capable. Because of this, and because newer CDMA devices also support GSM (for traveling, since few countries use CDMA outside of the US), you can put a GSM SIM card in a CDMA/LTE device and it will work on GSM networks. Some networks, such as Sprint, try to counter this by artificially blocking out US SIM cards from other providers (so you can put in a Canadian SIM card for example and use a Sprint CDMA/LTE device on a GSM network, but the phone will not accept for example an AT&T SIM card).
The way everything is headed though is that everything (calls, text, mobile data) will be carried over LTE. Voice over LTE is called VoLTE.
I agree with @product F
Sent from my GT-I9300 using XDA app.

[Completed] Can a cdma phone (with a sim card slot) be flashed to allow gsm carrier sim cards

i bought a Us Cellular phone off ebay and since it has a sim card slot, i assumed it would work with my gsm sim card. it didnt. my question is that is it possible to flash it from being cdma to work with a gsm sim.
Hi, thank you for using XDA Assist. Generally it is not possible. Whether it is cdma or gsm is hardware dependent.

Can two carriers be used on G930U at the same time like on dual-sim model?

so the 930U is the carrier unlocked version and supports both CDMA and GSM. of course can't use two GSM carriers since only one sim card slot, but can i use a GSM and CDMA concurrently? one for voice and other for data for example?

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