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CDMA to GSM is it possible

Greetings guys I just like to know if its possible to Get a CDMA phoe to be converted to GSM. let say I want to buy a HTC diamond from sprint which is a CDMA but i know theres a slot inside for a SIM card now can I flash it to make it a GSM compatible phone? thank you for the answers.

xanderkain said:
Greetings guys I just like to know if its possible to Get a CDMA phoe to be converted to GSM. let say I want to buy a HTC diamond from sprint which is a CDMA but i know theres a slot inside for a SIM card now can I flash it to make it a GSM compatible phone? thank you for the answers.
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No, there is no slot for a sim card in my CDMA Diamond. The radios in the CDMA and GSM phones are very different. There is no way the radios will work.

thacounty said:
No, there is no slot for a sim card in my CDMA Diamond. The radios in the CDMA and GSM phones are very different. There is no way the radios will work.
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Oh I see thank you for that information I just figgured because my GSM diamond has that option for WCDMA thats why I think the Diamond works both ways.

xanderkain said:
Oh I see thank you for that information I just figgured because my GSM diamond has that option for WCDMA thats why I think the Diamond works both ways.
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Anytime, I almost bought one for telus and it wouldn't even work on Sprint, they are both CDMA.

xanderkain said:
Oh I see thank you for that information I just figgured because my GSM diamond has that option for WCDMA thats why I think the Diamond works both ways.
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Common mistake, WCDMA and CDMA are completely different things. WCDMA is UMTS, high speed 3G for GSM phones. CDMA is its own type of network separate from GSM, using no SIM cards. Many people mix them up, but just make sure to note the difference. ;-)

Thundarr The Barbarian said:
Common mistake, WCDMA and CDMA are completely different things. WCDMA is UMTS, high speed 3G for GSM phones. CDMA is its own type of network separate from GSM, using no SIM cards. Many people mix them up, but just make sure to note the difference. ;-)
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this is a verry good information thank you for clearing this up

greetings again guys can someone tell me which version of HTC Diamond is this one
http://www.timtechs.com/htc_p3700_touch_diamond_unlocked_prd341.html

xanderkain said:
greetings again guys can someone tell me which version of HTC Diamond is this one
http://www.timtechs.com/htc_p3700_touch_diamond_unlocked_prd341.html
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Has EDGE, not EVDO, this is a GSM Diamond, plus the numbers are 3700, that is also a telltale sign.

That's a standard UMTS/WCDMA + GSM version.
But for AT&T, you will only get GSM coverage. The UMTS/WCDMA 3G on that phone runs on 900/2100mhz, whereas AT&T uses 850/1900mhz for its 3G.
If you want to have 3G right away, you should go pick one up from BestBuy which is selling the 3G 850/1900mhz version. Of course if you don't want 3G (or don't want to pay AT&T for a 3G plan) then it won't matter.

As you can see on the web site theres 2 version of HTC diamond one is 3 band and one is 4 band is there any significant difference? because currently I bought the Quad band from that web site Im kinda confused because for some reason theres many version of this phone.... and one more thing the 3G for AT&T is that the one they call the Media Net because I added that to my service which will start on the end of this month I just want to know before i spend money on something that wouldnt work on my phone thank you once again for the knoledgeable people here...

[Q]Using T-mobile USA

I have gotten my sim card unlocked on my d3 by verzion, put in a tmobile sim, i wanted to know how i can actually use it i put on gsm umts etc...

You would need to band unlock it. From what I've seen, its not possible yet. I have T-Mobile as well.

jawsofire said:
You would need to band unlock it. From what I've seen, its not possible yet. I have T-Mobile as well.
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Couldn't we make a pudding from 2 different sbf's from a band-unlocked one with ours to unlock those bands?

jawsofire said:
You would need to band unlock it. From what I've seen, its not possible yet. I have T-Mobile as well.
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no such thing band unlock!
it is simple not support t-mobile AWS band

cgigate said:
no such thing band unlock!
it is simple not support t-mobile AWS band
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it has the capabilities or reaching their freq's, btw when i have the sim in, and i look at apns, it says tmobile us it just doesn't connect :/

cgigate said:
no such thing band unlock!
it is simple not support t-mobile AWS band
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Maybe not the AWS band, but it could connect to the normal GSM. If it was band unlocked. The radio blocks out all US GSM carriers.
ericerk said:
it has the capabilities or reaching their freq's, btw when i have the sim in, and i look at apns, it says tmobile us it just doesn't connect :/
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You could try to flash the XT883 ROM and give it a try. The radio of said ROM should not block the US carriers. And if that's not working, don't worry, the XT862 and XT883 ROMs can be flashed vice versa without problems.

as others have said
I tried this on a recent trip to the USA and it didnt work even though my xt862 is unlocked. The xt862 is band locked from the US GSM carriers and so it wont see the networks as being available. Additionally, Tmobile uses AWS and the xt862 doesnt support those frequencies, so even band unlocking wont help.

Verizon HTC 1 to T-mobile

Hey everyone. So i have a question that i can't find on here so im going to ask it. I have a Verizon HTC one unlocked. The sim car works fine and i can do everything on the phone with the T-mobile sim card. The issue is its always Edge data. Is there a specfic APN i have to use? something im not seeing? Does anyone else have this issue? It is a stock factory HTC One, nothing custom.

super-6-1 said:
Hey everyone. So i have a question that i can't find on here so im going to ask it. I have a Verizon HTC one unlocked. The sim car works fine and i can do everything on the phone with the T-mobile sim card. The issue is its always Edge data. Is there a specfic APN i have to use? something im not seeing? Does anyone else have this issue? It is a stock factory HTC One, nothing custom.
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I don't think the Verizon model will have the correct radio frequencies to use T-Mo's LTE or HSPA+ network, hence you're stuck on Edge. If you're staying with T-Mo, I'd suggest selling your current One and buying a T-Mo specific HTC One.

LBN1 said:
I don't think the Verizon model will have the correct radio frequencies to use T-Mo's LTE or HSPA+ network, hence you're stuck on Edge. If you're staying with T-Mo, I'd suggest selling your current One and buying a T-Mo specific HTC One.
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This is pulled from Verizons website
Network: LTE, CDMA/1xEVDO Rev. A (800/1900 MHz)
Global Network: EDGE/GSM (850/900/1800/1900), HSPA/UMTS(1900/2100) aGPS capable for E911 emergency location, aGPS (assisted), sGPS (simultaneous), Standalone GPS, eCompass, GLONASS
T-mobile uses the 1900 Mhz base band and the HSPA as well. So i don't see the issue in that one.

super-6-1 said:
This is pulled from Verizons website
Network: LTE, CDMA/1xEVDO Rev. A (800/1900 MHz)
Global Network: EDGE/GSM (850/900/1800/1900), HSPA/UMTS(1900/2100) aGPS capable for E911 emergency location, aGPS (assisted), sGPS (simultaneous), Standalone GPS, eCompass, GLONASS
T-mobile uses the 1900 Mhz base band and the HSPA as well. So i don't see the issue in that one.
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From what I can tell, nobody uses the dual 1900/2100 to achieve 4G like TMO. The UMTS referred to on that phone is for worldwide use, not US. So while it may have the frequencies, it is not set up to use them like TMO. Your software and firmware are set up to work with Verizon and overseas, not with a competitor like TMO. TMO refers to theirs as HSPA+. However, it might work on the new "reframed" 1900 bands (which is called HSPA), but those are not very highly deployed. Unfortunately, I don't see LTE on that list of frequencies. The TMO LTE is really great. EDIT: I mean TMO LTE, which is also 1700/2100.
I suppose you could try unlocking it and flashing the TMO radio, but there is an entire thread on trying to unlock TMO frequencies (in that case on the developer version), and no one has figured it out yet.
I concur that your best bet would be to sell the phone and get a TMO model.

stevedebi said:
From what I can tell, nobody uses the dual 1900/2100 to achieve 4G like TMO. The UMTS referred to on that phone is for worldwide use, not US. So while it may have the frequencies, it is not set up to use them like TMO. Your software and firmware are set up to work with Verizon and overseas, not with a competitor like TMO. TMO refers to theirs as HSPA+. However, it might work on the new "reframed" 1900 bands (which is called HSPA), but those are not very highly deployed. Unfortunately, I don't see LTE on that list of frequencies. The TMO LTE is really great. EDIT: I mean TMO LTE, which is also 1700/2100.
I suppose you could try unlocking it and flashing the TMO radio, but there is an entire thread on trying to unlock TMO frequencies (in that case on the developer version), and no one has figured it out yet.
I concur that your best bet would be to sell the phone and get a TMO model.
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Yeah thats what im thinking. I need to contact and t-mobile rep and see if the re-farmed LTE here. Ill call and ask.

Alright so i called the rep and he said the area i am has been re-farmed to the 1900 range and i should be getting at least HSPA/3G but im not. Very odd issue

super-6-1 said:
Hey everyone. So i have a question that i can't find on here so im going to ask it. I have a Verizon HTC one unlocked. The sim car works fine and i can do everything on the phone with the T-mobile sim card. The issue is its always Edge data. Is there a specfic APN i have to use? something im not seeing? Does anyone else have this issue? It is a stock factory HTC One, nothing custom.
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Verison use the CDMA, maybe that's why you can only use 2.5G network, just like some phones in China, they only have GSM in common

xunqren said:
Verison use the CDMA, maybe that's why you can only use 2.5G network, just like some phones in China, they only have GSM in common
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yes but this phone has 4g lte already in it which accepts the sim card. Also, i have seen other verizon htc ones with t-mobile and never had a issue. I fell i may have to use a custom rom.

super-6-1 said:
yes but this phone has 4g lte already in it which accepts the sim card. Also, i have seen other verizon htc ones with t-mobile and never had a issue. I fell i may have to use a custom rom.
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What he is referring to is that what Verizon uses as "3G" is CDMA technology. So although they (T-Mobile and Verizon) may be on the same frequency they're using totally different technologies. Just because it has a sim card slot for a Verizon sim doesn't mean the device will be compatible with another carrier's sim. A custom ROM would not resolve this issue. Your best bet would be to sell this device and purchase one from T-Mobile. :fingers-crossed:

jayrivi said:
What he is referring to is that what Verizon uses as "3G" is CDMA technology. So although they (T-Mobile and Verizon) may be on the same frequency they're using totally different technologies. Just because it has a sim card slot for a Verizon sim doesn't mean the device will be compatible with another carrier's sim. A custom ROM would not resolve this issue. Your best bet would be to sell this device and purchase one from T-Mobile. :fingers-crossed:
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I know what the best way to go is but i am very curious as to what is really keeping it from going out of edge. baseband? Is the TMO and Verizon radios the same? these are things i need to know! >.<

super-6-1 said:
I know what the best way to go is but i am very curious as to what is really keeping it from going out of edge. baseband? Is the TMO and Verizon radios the same? these are things i need to know! >.<
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My understanding is that the devices run on different systems for 3G and different LTE bands. You wont get more than GSM compatibility (GPRS, EDGE). Hopefully it is something that a software hack can fix but if you read around all the HTC One forums you will see no one has found it. Right now it is not possible.

jayplusone said:
What he is referring to is that what Verizon uses as "3G" is CDMA technology. So although they (T-Mobile and Verizon) may be on the same frequency they're using totally different technologies. Just because it has a sim card slot for a Verizon sim doesn't mean the device will be compatible with another carrier's sim. A custom ROM would not resolve this issue. Your best bet would be to sell this device and purchase one from T-Mobile. :fingers-crossed:
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My question is that HTC makes phones for all T mobile verison sprint the same, so I believe its just software problem that we cant use Tmobile 4g lte on Verizon unlocked phone. SO does anyone have any comment for that?

aaloknaik said:
My question is that HTC makes phones for all T mobile verison sprint the same, so I believe its just software problem that we cant use Tmobile 4g lte on Verizon unlocked phone. SO does anyone have any comment for that?
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It is hardware not software that is the issue. The T-Mobile variant has different bands than the other variants including Verizon. T-Mobile is a GSM variant while Verizon is a CDMA variant. Here is a comparison of the specs for the variants.

CDMA and GSM technology requires the antenna to be done differently. If they are not programmed to use those signals. Nothing you can dox will change it short of putting a new antenna in.

majmoz said:
It is hardware not software that is the issue. The T-Mobile variant has different bands than the other variants including Verizon. T-Mobile is a GSM variant while Verizon is a CDMA variant. Here is a comparison of the specs for the variants.
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SO how do i know if my phone is Verizon CDMA unlocked or GSM unlocked

aaloknaik said:
SO how do i know if my phone is Verizon CDMA unlocked or GSM unlocked
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Because you can only unlock GSM. Cdma uses the serial/esn number of the device.

Has there been any update on this? I called tmobile and they said it was simply because I couldn't put in the APN. So, there's no chance that rooting the phone and putting a tmobile rom on it would fix the problem and let me get more than edge speeds.

I myself have been wondering the answer to this. The device might seem the same but under the cover they are different. The actual daughter board which the camera, vibrating thing, volume rocker, power button are connected to are fairly different from each other. The CDMA variant is not compatible with the GSM variant. Not even by adding a CDMA daughter board to the GSM motherboard and vice versa, the are made quiet differently and will not be able to use GSM bands on a CDMA m7
Sent from my HTC My touch 4G
¤-¤-TIP FROM THE NOOB-¤-¤
1. Enable USB Debugging before flashing custom recovery.
2. Make a backup via recovery before granting apk's root permission, editing system files, or flashing a new Rom
☺*better safe than sorry*☺
?May the Angels lead your way Tom (Tony Stark) . Thanks for your contribution ?*

[Q] Moto X Republic Wireless

Hi. Greetings to all
I'm from Malaysia, and I'm interested to buy Moto X from RW since it's cheaper than DE. And I'm sure it's locked, but does it support GSM network? On wiki it writes unknown. Before, it used to share the same column as Sprint
Thanks in advance for your answer/s!

syathibiy said:
Hi. Greetings to all
I'm from Malaysia, and I'm interested to buy Moto X from RW since it's cheaper than DE. And I'm sure it's locked, but does it support GSM network? On wiki it writes unknown. Before, it used to share the same column as Sprint
Thanks in advance for your answer/s!
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Since RW uses Sprint as its network, the Moto X you buy from them would be CDMA.

The phone is CDMA but it does have a SIM slot. So I'm wondering if it's possible to use with a GSM carrier. Or how to even root this phone.

The sim card is for the lte.
Sent from my XT1049 using Tapatalk

oversteps said:
Since RW uses Sprint as its network, the Moto X you buy from them would be CDMA.
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Madblaster6 said:
The phone is CDMA but it does have a SIM slot. So I'm wondering if it's possible to use with a GSM carrier. Or how to even root this phone.
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That's the thing. Is it really CDMA? If I'm not mistaken, a CDMA phone doesn't use a SIM and doesn't even have a SIM slot. So, what's the SIM slot for? If one can put a SIM card, shouldn't it mean one can also use the GSM network? No?

https://community.republicwireless.com/docs/DOC-1652#CONNECTIVITY
Networks
CDMA (1900 and 800)/EVDO Rev. A - 4G LTE
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ryude said:
https://community.republicwireless.com/docs/DOC-1652#CONNECTIVITY
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Yep, noticed that when I went thru RW website. But can you explain why is there a SIM slot?

syathibiy said:
Yep, noticed that when I went thru RW website. But can you explain why is there a SIM slot?
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Sure, LTE is the reason for SIM.
CDMA is a single-band network (hence why previously you could not talk and surf the web simultaneously). In order to connect on the LTE frequency, the SIM (Subscriber Identity Module) card identifies the phone for registering on the network.
Sprint uses 850Mhz for CDMA and 1900Mhz for LTE.

ryude said:
Sure, LTE is the reason for SIM.
CDMA is a single-band network (hence why previously you could not talk and surf the web simultaneously). In order to connect on the LTE frequency, the SIM (Subscriber Identity Module) card identifies the phone for registering on the network.
Sprint uses 850Mhz for CDMA and 1900Mhz for LTE.
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So, you're saying all CDMA phones are using SIM now for its LTE connectivity?

I'm not sure if EVERY cdma LTE phone uses a SIM, but I do know that it's very common.

Every LTE phone uses a Sim. Because LTE is for one thing a gsm technology.
The republic wireless moto x hardware probably does support normal non LTE gsm as its the same hardware as the sprint model . that said its probably boot loader locked and firmware locked to not support gsm . they are not that dumb to let people buy the phones to not use on their network .

sleepyguy007 said:
Every LTE phone uses a Sim. Because LTE is for one thing a gsm technology.
The republic wireless moto x hardware probably does support normal non LTE gsm as its the same hardware as the sprint model . that said its probably boot loader locked and firmware locked to not support gsm . they are not that dumb to let people buy the phones to not use on their network .
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It's not that I don't wanna use their network. It's because of the limited availability and, price point too

sleepyguy007 said:
Every LTE phone uses a Sim. Because LTE is for one thing a gsm technology.
The republic wireless moto x hardware probably does support normal non LTE gsm as its the same hardware as the sprint model . that said its probably boot loader locked and firmware locked to not support gsm . they are not that dumb to let people buy the phones to not use on their network .
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This is what I was curious about. Whether or not the radios are there and just disabled, or whether they do not exist in it at all.

Verizon 5G model

Hello
Will this device work on other carrier's 5G network (like AT&T or Sprint)? If not, will it work on their 4G LTE network?

wirelessrevolution said:
Hello
Will this device work on other carrier's 5G network (like AT&T or Sprint)? If not, will it work on their 4G LTE network?
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Don't know about Sprint, but it'll work with other GSM carriers. If you get the activation issue, just flash AT&T's firmware.

So it has all the necessary hardware (band support) to work completely on another GSM Network (like AT&T)

wirelessrevolution said:
So it has all the necessary hardware (band support) to work completely on another GSM Network (like AT&T)
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Yes. Both the AT&T and Verizon S10 5G are the same model but with another CSC.

What is CSC?

wirelessrevolution said:
What is CSC?
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Customer Sales Code. The CSC is used to provide carrier specific features.