I have a CDMA Rhodium (Sprint version) that is unlocked so I can use it on AT&T. I want to put Android on it, however when I have tried in the past it wouldn't work because the GSM version wouldn't work on my phone and the CDMA version can't use the GSM signal. Is there anyway to use Android on my phone in this situation? Thanks in advance!
HappyKhicken said:
I have a CDMA Rhodium (Sprint version) that is unlocked so I can use it on AT&T. I want to put Android on it, however when I have tried in the past it wouldn't work because the GSM version wouldn't work on my phone and the CDMA version can't use the GSM signal. Is there anyway to use Android on my phone in this situation? Thanks in advance!
Click to expand...
Click to collapse
force_cdma=0 in your startup.txt, should work.
You can't run both radios at the same time, but GSM-only should work for you.
arrrghhh said:
force_cdma=0 in your startup.txt, should work.
You can't run both radios at the same time, but GSM-only should work for you.
Click to expand...
Click to collapse
I thought simply unlocking the phone didn't help in getting American GSM signals, because the phone is set up to only look for Worldwide GSM frequencies which are different from American? It has the capabilities to run American GSM signals, but I thought there needed to be further modification besides just unlocking the phone. I know the actual frequencies have to be flashed to the phone in WM, but I was unsure on whether these frequencies are built into the XDAndroid build?
slickdaddy96 said:
I thought simply unlocking the phone didn't help in getting American GSM signals, because the phone is set up to only look for Worldwide GSM frequencies which are different from American? It has the capabilities to run American GSM signals, but I thought there needed to be further modification besides just unlocking the phone. I know the actual frequencies have to be flashed to the phone in WM, but I was unsure on whether these frequencies are built into the XDAndroid build?
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Click to collapse
Frequency support is in the radio itself - you can't flash the capability. If what you say is true, then he may not get 3G service, but he'll at least be able to make/receive calls and txts. Internet should work, but be painfully slow.
I'm not sure what frequencies the RHOD supports, but AFAIK it's a lot - Sprint and Verizon sell the TP2 as a 'world phone' - and usually phones branded with that moniker have a wide range of frequency support - again, built into the radio. Has nothing to do with the software running on the phone. If the frequency is supported in WinMo, it'll be supported in Android.
arrrghhh said:
Frequency support is in the radio itself - you can't flash the capability. If what you say is true, then he may not get 3G service, but he'll at least be able to make/receive calls and txts. Internet should work, but be painfully slow.
I'm not sure what frequencies the RHOD supports, but AFAIK it's a lot - Sprint and Verizon sell the TP2 as a 'world phone' - and usually phones branded with that moniker have a wide range of frequency support - again, built into the radio. Has nothing to do with the software running on the phone. If the frequency is supported in WinMo, it'll be supported in Android.
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Click to collapse
I agree with you that it is built into the radio. What I was saying is that simply unlocking the phone in Windows Mobile does not "make active" the American frequencies because the programming is such that Sprint and Verizon make sure the software explicitly either blocks or makes sure it can not use those frequencies.
It could be that XDandroid does not have those limitations in the builds and can use whatever frequency you want to. I don't know how much XDandroid depends on the settings etc... of windows mobile to run though. It could be you might have to get rid of that issue in WM before Android will properly be able to use AT&T frequencies. I don't know which is true, because I am not planning to try to use AT&T on my phone, thus I don't care to explore it! I was just bringing up that possibility just in case the guy puts force_cdma=0 and it still doesn't work for him.
slickdaddy96 said:
I was just bringing up that possibility just in case the guy puts force_cdma=0 and it still doesn't work for him.
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Click to collapse
No worries. If that's the case, I'd like to know if it works in WinMo. Because if it works in WinMo and not Android, then we're missing something in Android. AFAIK we're not missing anything that's at the core like that, but who knows.
i always thought you had to unlock (http://rhodium.htc-unlocks.com/) AND flash a custom rom for it to work on gsm att/t-mo usa. i guess if it works in winmo, theoretically it should work in android w/ force_cdma = 0. naturally you'd only get 2G data, but ehhhhhhh..
I'm assuming when you say to use the force_CDMA=0 in my startup.txt file, you mean for the CDMA version of Android, correct? Or should I use the GSM version?
HappyKhicken said:
I'm assuming when you say to use the force_CDMA=0 in my startup.txt file, you mean for the CDMA version of Android, correct? Or should I use the GSM version?
Click to expand...
Click to collapse
That's the beauty - there isn't a different CDMA/GSM version - every build supports both, simply by changing that force_cdma value in the startup.txt...
AkumaX said:
i always thought you had to unlock (http://rhodium.htc-unlocks.com/) AND flash a custom rom for it to work on gsm att/t-mo usa. i guess if it works in winmo, theoretically it should work in android w/ force_cdma = 0. naturally you'd only get 2G data, but ehhhhhhh..
Click to expand...
Click to collapse
In order to operate on the domestic gsm network, you will need to Security Unlock, then flash a patched radio, then use a T-Mobile or AT&T SIM card. You will only have Edge data and not 3G.
Sent from my FROYO X using Tapatalk
Related
A question came up on the us forum for Defy about the different software builds until finally a Moto-mod came in with this. It's intriguing in that apparently the Defy has all band capability, but the software build limits the choice. Here's the quote:
"Each Blur Version for the Defy is all Carrier and Regional Specific like for instance For US T-Mobile Customers its 3.6.19.0 however for UK T-Mobile Users I think the latest version is 2.51 Other parts of europe are using 2.34 without MotoBlur and so on and so fourth, the main difference is Carrier installed apps and the confusing part, from what i've expierenced with the phone, Its the first phone i've ever seen with a software controlled universal radio supporting all bands, however its software tells it which band to use, for instance if you 2.21 and 2.51 UK versions are using UMTS 900/2100 where US's 3.6.190 is using AWS 1700/2100. there are ways if you look to obtain version 2.51.1 however this isn't the place to look on instructions on how to do it because its against the forum rules, is unsupported and with 2.51 if for whatever reason you wanted to downgrade you couldn't unfortunatly."
WHAT.
Software defined radio?
If this is for real the hackers SHOULD REALLY HAVE A FIELD DAY with this phone.
It's a shame they're too busy with the Samsungs and HTCs of the world..
There's quite a difference between true software defined radio (most radios these days are sort of there, as they are most commonly some embedded chip with custom firmware but nothing like a Linux kernel) and being able to switch frequencies to be used
nupi said:
There's quite a difference between true software defined radio (most radios these days are sort of there, as they are most commonly some embedded chip with custom firmware but nothing like a Linux kernel) and being able to switch frequencies to be used
Click to expand...
Click to collapse
I'm not an expert, but the basic thrust of this was that all Defy phones are identical and capable of all frequencies, but the firmware defines which can be used. Therefore it seems -- to this novice mind -- that change the firmware change the phone.
The other, related issue is the frustration of some Euro phone owners who really know nothing about differences in 3G frequencies. buy a phone and presume they can use them in the US (as one can with an iPhone). Those of us who prowl these forums are basically smart enough to know that before you buy a phone we have to be sure we can actually use it -- but 90% of buyers buy a phone presuming they can.
Okay well can someone on the forum test this out? You'd need the ability to try and access both sets of frequencies.
Example: You're in Australia and you have a Defy from Telstra which you've also unlocked. Your stock firmware supports 850/AWS/2100. You should be able to get an 850 MHz signal from Telstra's NextG network. Now, if you put in an Optus SIM and visit an area with 900 MHz 3G coverage but not 2100, you'll find the phone drops to EDGE or gets no signal.
So at this point, take a nandroid backup, and flash a 900/2100 firmware or replace the radio files with ones from such a firmware. Now repeat the same test... does it successfully register on Optus at 900 MHz?
Sent from my Nexus One using XDA App
Radio issues...
Strictly on the band issue, I don't think they are that apart. A good radio would be able to handle it without being full SDR.
I agree partly on the point that these radios are somehow SDR for they do change the frequencie ranges by changing firmware.
A full SDR would be able to change even to CDMA or something else, not only the band!
If you want to challenge someone for doing something about it, ask for a full tri-band version of the Defy radio! (That I would ask for too!)
I intend to use my Defy originally 850/1900 over a 2100 network.
Well that's is my humble guess.
KMur said:
A full SDR would be able to change even to CDMA or something else, not only the band!
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Click to collapse
Interesting, as if you go into the INFO menu and select "set preferred network type" one choice (which it will not allow) is CDMA. But it's there.
Which version of the Defy is UMTS 850/1900? I thought there was only 850/1700/2100 and 900/2100.
Also, pretty much all Androids have CDMA as a listed option, not because they're compatible, but because it's a testing menu that was designed to be applicable to a wide variety of phones.
Sent from my Nexus One using XDA App
Will the G-Nex from Verizon be able to fully utilize AT&T's network if it is rooted and a new radio and rom flashed to it? i.e. is it capable of jumping the CDMA/GSM divide with software updates?
Thanks,
Akh
No. It only has a CDMA radio, not GSM. Software can't change that.
I thought I had read somewhere that Samsung was dramatically changing the radio design in the GS2 and G-Nex, so I was hoping it might be possible.
Thanks
Nope, not at all possible.
one point twenty one jiggawatts!!!!!
I'm curious about this too. Because the Sim card/4G is GSM, if we were to go into phone settings and set it to "GSM ONLY" would it work?
This is more an issue of curiosity than anything.
I understand that the CDMA radio won't work on a GSM network.
Just curious is all.
No it definitely will not work in any way whatsoever unfortunately.
Yes LTE is a form of GSM but the GSM radio in to only works with Verizon LTE, nothing else
cokm4n said:
i'm curious about this too. Because the sim card/4g is gsm, if we were to go into phone settings and set it to "gsm only" would it work?
This is more an issue of curiosity than anything.
I understand that the cdma radio won't work on a gsm network.
Just curious is all.
Click to expand...
Click to collapse
No. It won't work.
It has even been shown that Verizon and AT&T are using different bands for 4G.
Sent from my Galaxy Nexus using XDA App
I didn't even think to look at the freq bands.
Thanks everyone for enduring my curious nature.
Sent from my Galaxy Nexus, straight from Google!
What's the differences between the two, if any?
I've been contemplating whether or not I should get the GSM version or CDMA. Are there any major differences between the two?
Sent from the future.
If you're on sprint, you kind of need to change to Verizon if you want the CDMA version. CDMA also has LTE aka true 4G, so speed will probably be better. VZW also has further reaching 3G coverage than AT&T, generally. On top of this, in my experience VZW's customer service is great, but everyone's mileage varies there.
The GSM version is not "official" for the US - you will have to pay full retail price on one ($600-ish) and sign up with tmobile or att to use it. No carrier subsidy.
Without further information about you, it's hard to say anything more.
I think the op was asking about the hardware spec. CDMA version has bigger battery and twice the storage space.
Does this mean that the Verizon version will not work on at&t? Or have slower speeds?
thanks. I wasn't referring to carrier information, though. I meant as far as hardware and software.
Did android 4.1 come with the Verizon version as promised?
Sent from the future.
SocialReject said:
thanks. I wasn't referring to carrier information, though. I meant as far as hardware and software.
Did android 4.1 come with the Verizon version as promised?
Sent from the future.
Click to expand...
Click to collapse
Verizon comes with 4.0.1 with a small update leading it to 4.0.2
ootz0rz said:
Does this mean that the Verizon version will not work on at&t? Or have slower speeds?
Click to expand...
Click to collapse
Yes, verizon version will not work on ATT.
In the US is very simple. Two types of radios: CDMA and GSM.
Verizon and Sprint use CDMA.
ATT and TMO use GSM.
The smaller carriers generally use either CDMA or GSM and piggy back off the larger carrier towers.
Hopefully android devices which have hardware and software capable of using both radios will arrive and it'll become less of an issue, but as of now, the galaxy nexus is either GSM or CDMA, but not both.
Hope that helps!
How about in the UK? Is there only one of these versions? And how do I find what version I have?
UK is gsm
Sent from my Galaxy Nexus using XDA App
ZPrimed said:
If you're on sprint, you kind of need to change to Verizon if you want the CDMA version. CDMA also has LTE aka true 4G, so speed will probably be better. VZW also has further reaching 3G coverage than AT&T, generally. On top of this, in my experience VZW's customer service is great, but everyone's mileage varies there.
The GSM version is not "official" for the US - you will have to pay full retail price on one ($600-ish) and sign up with tmobile or att to use it. No carrier subsidy.
Without further information about you, it's hard to say anything more.
Click to expand...
Click to collapse
LTE IS NOT true 4G.
There is no True 4G in the US.
Google the definition of 4G.
Hi everybody, I have a verizon Galaxy Nexus I understand it's a CDMA, is there any hardware differences between this and a GSM one? or is only software? will this device work on a GSM network if I flash a GSM Rom on it?
thanks for your help!
jhonyDroid said:
Hi everybody, I have a verizon Galaxy Nexus I understand it's a CDMA, is there any hardware differences between this and a GSM one? or is only software? will this device work on a GSM network if I flash a GSM Rom on it?
thanks for your help!
Click to expand...
Click to collapse
Don't even think about flashing a GSM rom on it.
mudferret said:
Don't even think about flashing a GSM rom on it.
Click to expand...
Click to collapse
thanks for your answer!
I thought it was some kind of adventurer try to mix roms but can you tell me what would happen by doing this? and, is there any way to get this CDMA phone work on a GSM network?
best regards!
jhonyDroid said:
Hi everybody, I have a verizon Galaxy Nexus I understand it's a CDMA, is there any hardware differences between this and a GSM one? or is only software? will this device work on a GSM network if I flash a GSM Rom on it?
thanks for your help!
Click to expand...
Click to collapse
Your CDMA version has a CDMA radio, a LTE radio, and antennas tuned to the correct LTE and CDMA frequencies used by Verizon.
The GSM version has a GSM radio with antenna turned to all common GSM frequencies.
The radios and antenna hardware are completely different in these versions and so by this fact the firmware (the software or flash able 'radio') is 100% different. Flashing the wrong one can cause all kinds of issues from not working until reflashing the correct ones yo bricking your radio (depending on how the firmware is flashed, size differences, etc.)
CDMA and GSM and LTE are all very different. LTE is based off GSM which is why you have a SIM card in LTE (though CDMA can have SIM cards if that is how the company set it up, which also is why without the SIM card you can't use your CDMA parts either).
Sent from my Galaxy Nexus using Tapatalk
jhonyDroid said:
I thought it was some kind of adventurer try to mix roms but can you tell me what would happen by doing this?
Click to expand...
Click to collapse
You will destroy your phone. It won't work ever again.
is there any way to get this CDMA phone work on a GSM network?
Click to expand...
Click to collapse
No. It's a hardware issue that can't be fixed with software.
---------- Post added at 10:21 AM ---------- Previous post was at 10:18 AM ----------
siberslug said:
LTE IS NOT true 4G.
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Click to collapse
Sure it is. Just like EDGE is "officially" 3G whenever carriers think it's in their marketing interest to say so. No one owns the term "3G" or "4G" so there's no such thing as "true" or "official". It is certainly marked performance advance over HSPA+, with real world LTE uplink speeds higher than HSPA downlink. It's at least as big of a jump from EDGE to UMTS (200kbps to 600kbps) was.
If you're referring to LTE Advanced, expect that technology to be labelled 5G when it hits the carriers. Why? Why the hell not? It's just a stupid marketing gimmick. Most consumers don't even know what the hell it means, with something like 70% of the population thinking that the iPhone 4/4S has 4G. Mo G's mo money.
Just to go along with what you are saying, the ITU changed it so that the current "4G" techs such as LTE, WIMAX, and HSPA+ are considered 4G.
I'm going to be upgrading my phone within a week or two. However, I plan on keeping my Play for gaming purposes. (Mostly emulators and a few other games.) Now my question is, since my Play won't be an active phone anymore, is it safe to flash GSM ROMs? Or will that affect other phone functionality? If data is the only thing that's lost with GSM ROMs then I should be fine right?
EDIT: Woops wrong section, meant to post this in Q and A. Sorry about that! "^_^
I'm about to buy a xperia play as a gaming device, and the cdma versions are much cheaper, so I have the same question. If it's unlocked for GSM, can we pop a sim and use it as a GSM phone with the GSM rom?
Actually, your question isn't the same as mine. And to answer your question, the answer is no. CDMA devices are built to work with CDMA frequencies. You cannot get a GSM SIM and place it in your CDMA device. It just won't function.
You can flash a GSM ROM on a CDMA Phone. You just can't use any phone functions. ie messaging, calling etc.
game_guy said:
Actually, your question isn't the same as mine. And to answer your question, the answer is no. CDMA devices are built to work with CDMA frequencies. You cannot get a GSM SIM and place it in your CDMA device. It just won't function.
Click to expand...
Click to collapse
Well, then I had 2 questions. 1 was your question, and then there was the other question. I thought Verizon had gsm in some of there phones, and you could unlock it for world use. It has a sim slot for some reason... The GSM roms are much better, so can we flash them on the CDMA R800x?
DubleJayJ said:
You can flash a GSM ROM on a CDMA Phone. You just can't use any phone functions. ie messaging, calling etc.
Click to expand...
Click to collapse
Alright thanks, once I get my new phone, I won't be able to do any of those things anyways.
Pokestory1 said:
Well, then I had 2 questions. 1 was your question, and then there was the other question. I thought Verizon had gsm in some of there phones, and you could unlock it for world use. It has a sim slot for some reason... The GSM roms are much better, so can we flash them on the CDMA R800x?
Click to expand...
Click to collapse
Just as JayJ said, you can flash a GSM ROM to a CDMA device, but you'll lose your data functionality. I'm pretty sure Verizon is a CDMA frequency company. Though I may be wrong.
game_guy said:
Alright thanks, once I get my new phone, I won't be able to do any of those things anyways.
Just as JayJ said, you can flash a GSM ROM to a CDMA device, but you'll lose your data functionality. I'm pretty sure Verizon is a CDMA frequency company. Though I may be wrong.
Click to expand...
Click to collapse
Checked GSM ARENA and your right. The xperia play CDMA is only a CDMA phone, unlike some phones(example htc trophy) I already have a phone, so this will be a nice wifi only device.
game_guy said:
Alright thanks, once I get my new phone, I won't be able to do any of those things anyways.
Just as JayJ said, you can flash a GSM ROM to a CDMA device, but you'll lose your data functionality. I'm pretty sure Verizon is a CDMA frequency company. Though I may be wrong.
Click to expand...
Click to collapse
It is. Verizon, CDMA. AT&T Sprint and T-Mobile are GSM( not surre about Sprint. Something with an S is CDMA also.
DubleJayJ said:
It is. Verizon, CDMA. AT&T Sprint and T-Mobile are GSM( not surre about Sprint. Something with an S is CDMA also.
Click to expand...
Click to collapse
Sprint is also CDMA.
To clear some stuff up. Yes, the R800x does have a sim slot. BUT it is not hooked up & our phones are hard coded for CDMA.
PS. Thread moved to Q&A
Pax
Sent from my Xperia Play using xda app-developers app
Will wifi still work if you flash a gsm rom to a cdma phone? I assume it will since wifi seems to be a kernel issue and I'd keep the cdma kernel but I'm afraid.
I also don't use the phone on a carrier network.
Evo_Shift said:
Will wifi still work if you flash a gsm rom to a cdma phone? I assume it will since wifi seems to be a kernel issue and I'd keep the cdma kernel but I'm afraid.
I also don't use the phone on a carrier network.
Click to expand...
Click to collapse
If you install a gsm kernel on a cdma rom you will get stuck in a bootloop. But if use a cdma kernel on a gsm rom you will get stuck with a blackscreen.
Sent from my R800x using xda premium
Hey guys, trying to get a Verizon Note 3 to work on TMO. I have a TMO rom installed in a safe strap, got it all running for the most part, but can't get data to work right. I used the TMO apn posted on TMO's website. When I switch from GSM only to LTE/WCDMA/GSM or WCDMA/GSM, I get no voice data or text. If I look at system status, on the mobile network state, it says Connecting, then Disconnected. And it just sits there and toggles back and forth. Any ideas? If I stay on GSM only, I have data, voice and text, but it's all on EDGE. Any input would be greatly appreciated!
I used this apn. http://support.t-mobile.com/docs/DOC-8373
1 of two things
1) Verizon model doesn't support GSM fully
2) doesn't support 1700mhz freq which T-Mo uses, it does support 1900 apparenrtly but you might not have that in your area.
JFizDaWiz said:
1 of two things
1) Verizon model doesn't support GSM fully
2) doesn't support 1700mhz freq which T-Mo uses, it does support 1900 apparenrtly but you might not have that in your area.
Click to expand...
Click to collapse
If I switch to the Verizon stock rom, I can get HSPA+.
I was under the assumption (maybe incorrectly) that the phones for the most part were all the same. Could I try flashing TMO modems to see if it unlocks the 1700mhz band? I live right by New York city so I would imagine that I would have the better frequencies here.
robreefer said:
If I switch to the Verizon stock rom, I can get HSPA+.
I was under the assumption (maybe incorrectly) that the phones for the most part were all the same. Could I try flashing TMO modems to see if it unlocks the 1700mhz band? I live right by New York city so I would imagine that I would have the better frequencies here.
Click to expand...
Click to collapse
It is NOT about unlocking frequencies. The phone itself is NOT sporting those frequencies. i.e. Hardware is not there.
ftarules said:
It is NOT about unlocking frequencies. The phone itself is NOT sporting those frequencies. i.e. Hardware is not there.
Click to expand...
Click to collapse
Ok, I miss understood then. Thank you for the reply!
let's not forget to mention that one is CDMA (Verizon) and the other is GSM (T-mobile)... or unless I missed it and it was somehow implied?