[Q] GSM and CDMA - Desire Q&A, Help & Troubleshooting

So I'm in Canada and I just got a Virgin mobile SIM but my phone is telling me network is unavailable. Phone (Desire bravo) is unlocked, cm7 etc. but after doing some looking I noticed that Virgin operates through the use of Bell's network which is a CDMA network. I assume this is the problem because there is nothing else I can think of.
Is it possible to flash a different rom that would allow me to switch to CDMA or is it hardware related? Also am I on the right lines or should this whole CDMA GSM thing not matter?
Cheers

davito18 said:
So I'm in Canada and I just got a Virgin mobile SIM but my phone is telling me network is unavailable. Phone (Desire bravo) is unlocked, cm7 etc. but after doing some looking I noticed that Virgin operates through the use of Bell's network which is a CDMA network. I assume this is the problem because there is nothing else I can think of.
Is it possible to flash a different rom that would allow me to switch to CDMA or is it hardware related? Also am I on the right lines or should this whole CDMA GSM thing not matter?
Cheers
Click to expand...
Click to collapse
Hardware related to CPU, you'll need a CDMA phone or change networks...

Related

Can I use HTC Harrier in worldwide CDMA network?

Hi,
I bought on the Ebay.com a HTC Harrier - Verizon XV6600, also known as Audiovox PPC6600 - now I want to use it somewhere else than USA - in which networks can I use the phone and how do I activate it?
The phone is 800/1900 Mhz CDMA device with out sim card slot!
Can I use it in a 3G network outside USA?
Thanks!
You can probably using it to any network that have CDMA service, to activate you have to call CDMA network provider, no I don't think you can use it as 3G, this is not a 3G device.
Actually the 6600 is a 3G device. If properly provisioned you can get EVDO. I have heard stories of users configuring it for use in other countries. If theres CDMA, it can be done. The verizon versions MSL unlock code is 000000, FYI
So I can use the Harrier in any CDMA 800/1900mhz network?
Doesn't it require a special software to be installed on the Harrier for each CDMA provider?
For instance - in my country there is one CDMA provider - it operates on 450mhz frequency and uses RUIM cards and the provider had no idea how to make this device work in their network!
Trough in my country there are also 2 GSM providers and the ofer EDGE and 3G services which operate in CDMA network - can I use those providers?
I'm really confused, because I don't know what to do with this device!!!
you can easily install a sim adaptor, (RUIM) it cost me a few bucks and it works. but you still need to unlock the radio.
vsi said:
you can easily install a sim adaptor, (RUIM) it cost me a few bucks and it works. but you still need to unlock the radio.
Click to expand...
Click to collapse
My dear,I have the same question,can you tell me how to unlock the radio?? Thanks a lot !!
I am using XV6600 (CDMA network) too. Anyone call tell me to find a ROM of WM5 for it? Thanks a lot!
gcafrk said:
I am using XV6600 (CDMA network) too. Anyone call tell me to find a ROM of WM5 for it? Thanks a lot!
Click to expand...
Click to collapse
there is no such thing, if you have reading the forums you will find it out for yourself

Unlocked TELUS PRO2 does not work on FIDO 3G network?

I bought HTC PRO2 (RHOD500) from Telus. I just noticed that it does not work on fido 3G network. GSM is fine.
If the Hard-SPL for world phone is released, can I use 3G fido network at that time?
Thanks
You can pay to get it sim unlocked now and it will work. Search for tmobile unlock on ebay. I am on Telus and it works perfect.
leanne said:
You can pay to get it sim unlocked now and it will work. Search for tmobile unlock on ebay. I am on Telus and it works perfect.
Click to expand...
Click to collapse
I knew that, and my phone has been unlocked. I can make phone call without any problem.
However, I can not use it with fido 3G network.
It does not work at all
Hey,
I don’t think its the phone . I have seen this issue many times in the past All your data settings are still set up for TELUS and the CDMA network, It’s not as simple as just unlocking the SIM card to get the data to work you have to go in an re-program the phone. I would suggest finding the Data setting on a Windows mobile device Fido has and just copying those into you Touch Pro 2. (you will most likely need to do this by hand)
Can’t promise it will work as I know some Carriers have certain fields added and removed to fit their needs which messes up the phone when you unlock it to use on other networks.
Wait!!
does this mean the RHOD500 has GSM and CDMA??
--- Does this mean?
1. Buy Telus TP2
2. Unlock
3. Switch to Fido/Rogers
4. Flash 6.1 GSM rom
5. Use 3g?
I think the issue here is that the Telus TP2 has had the 850/1900MHz UMTS bands disabled for some retarded reason. (Seems especially retarded seeing as how they are rolling out a UMTS network running on those bands in a couple of months).
There is speculation that the bands physically exist on the Telus TP2 but they have been software disabled. The other possibility is that the hardware is not physically present to utilize the 850/1900MHz bands that Fido/Rogers use for their 3G data and that the Telus TP2 will never work on their 3G networks (as well as its own upcoming one) but I think that would be a seriously regretful move on Telus' part.
The spec sheet for the MSM7600 indicates that the phone may or may not be capable of using the 850/1900MHz bands, but according to HTC and Telus' specifications it definitely is able to use the 2100MHz bands (which makes zero sense in Canada since nobody will be using those bands for a long time).
Rick#2 said:
I think the issue here is that the Telus TP2 has had the 850/1900MHz UMTS bands disabled for some retarded reason. (Seems especially retarded seeing as how they are rolling out a UMTS network running on those bands in a couple of months).
There is speculation that the bands physically exist on the Telus TP2 but they have been software disabled. The other possibility is that the hardware is not physically present to utilize the 850/1900MHz bands that Fido/Rogers use for their 3G data and that the Telus TP2 will never work on their 3G networks (as well as its own upcoming one) but I think that would be a seriously regretful move on Telus' part.
The spec sheet for the MSM7600 indicates that the phone may or may not be capable of using the 850/1900MHz bands, but according to HTC and Telus' specifications it definitely is able to use the 2100MHz bands (which makes zero sense in Canada since nobody will be using those bands for a long time).
Click to expand...
Click to collapse
This isn't extremely helpful, but
http://web.archive.org/web/20071025232258/www.cdmatech.com/download_library/pdf/msm7600_chipset.pdf
according to that (if I'm reading right) there has to be at least 1 other UMTS band, no configuration is ONLY 2100MHz (the chipset that does only that doesnt do the 1900MHz PCS band for CDMA). But really, I'm pretty much guessing.
Hi I am using the unlocked Telus version on Fido. It's true that you can't use 3G because the phone does not support the required bands. But I still use EDGE. It's slower but better than nothing. Create a new connection and name it Fido. APN is : internet.fido.ca
Username: fido
PW: fido
Hope this helps.
https://www.telusmobility.com/en/QC/htc_touchpro2_t7379/index.shtml
Go to this site, click on the Details button and you'll see that the TP2 supports all of the above mentioned Bands. The bands are all software locked and once Telus initializes the new network (along with WinMo 6.5) they will offer the firmware upgrade to open ALL the GSM bands. It'll just be the question of unlocking the simlock on the device!
wraith79 said:
https://www.telusmobility.com/en/QC/htc_touchpro2_t7379/index.shtml
Go to this site, click on the Details button and you'll see that the TP2 supports all of the above mentioned Bands. The bands are all software locked and once Telus initializes the new network (along with WinMo 6.5) they will offer the firmware upgrade to open ALL the GSM bands. It'll just be the question of unlocking the simlock on the device!
Click to expand...
Click to collapse
I think that maybe you are confusing GSM bands with the UMTS/HSPA bands.
There's a big difference between the GSM/Edge bands and WCDMA/UMTS.
I have been following the subject and there`s no concrete evidence that the 850/1900 WCDMA/UMTS bands are only software.
Where the hell did you get your firmware upgrade information? I've only seen this info given as pure speculation!
If the TouchPro 1 is any indication, the phone might be missing some key components to make it work. In the case of the TP1 it was the amplifier that was missing so it couldn't work even chipset and everything could support it.
(see: http://forum.xda-developers.com/showthread.php?t=420865&page=40)
So while it's possible, until someone does a teardown of the phone and we see all the required component it's simply not possible to say that 3G on a GSM network is possible.
The ONLY indication I have seen that it might support 850/1900 HSPA network is the fact that telus stated that the Tour and Storm will not work on the HSPA network. They failed to mention the TP2 so maybe we can read between the lines:
http://mobilesyrup.com/2009/08/16/t...be-compatible-with-the-canadian-hspa-network/
Axeslocked said:
Wait!!
does this mean the RHOD500 has GSM and CDMA??
--- Does this mean?
1. Buy Telus TP2
2. Unlock
3. Switch to Fido/Rogers
4. Flash 6.1 GSM rom
5. Use 3g?
Click to expand...
Click to collapse
Oh and please never flash a GSM rom on a CDMA / World phone!
labbbby said:
Oh and please never flash a GSM rom on a CDMA / World phone!
Click to expand...
Click to collapse
lol.. I second that
UMTS Bands
labbbby said:
I think that maybe you are confusing GSM bands with the UMTS/HSPA bands.
There's a big difference between the GSM/Edge bands and WCDMA/UMTS.
I have been following the subject and there`s no concrete evidence that the 850/1900 WCDMA/UMTS bands are only software.
Where the hell did you get your firmware upgrade information? I've only seen this info given as pure speculation!
If the TouchPro 1 is any indication, the phone might be missing some key components to make it work. In the case of the TP1 it was the amplifier that was missing so it couldn't work even chipset and everything could support it.
(see: http://forum.xda-developers.com/showthread.php?t=420865&page=40)
So while it's possible, until someone does a teardown of the phone and we see all the required component it's simply not possible to say that 3G on a GSM network is possible.
The ONLY indication I have seen that it might support 850/1900 HSPA network is the fact that telus stated that the Tour and Storm will not work on the HSPA network. They failed to mention the TP2 so maybe we can read between the lines:
http://mobilesyrup.com/2009/08/16/t...be-compatible-with-the-canadian-hspa-network/
Click to expand...
Click to collapse
I have been following this debate on multiple forums.
Based on some information from RileyFreeman, I do think Telus will enable the TouchPro2 for new HSPA network.
Granted, today, you can unlock and use on Rogers, Fido or ATT networks using EDGE, it would be a real poor move for Telus to not have an upgrade path to HSPA.
This is Telus's non Blackberry flagship business device, today, Telus has Enterprise customers testing the HSPA network (likely either PC cards or USB modems). Once HTC releases Windows Mobile 6.5, this would be an ideal time to upgrade the radio's and unlock the 850/1900 UMTS bands.
I can see the 850/1900 bands today, not 100% if they are actually there, also wondering if Telus is also waiting for ATT to release TP2 so ATT can test ROM, Sprint nor Verizon would not have any need to do any regression testing on ROM that supports UMTS bands. Tell tale sign will be if ATT TP2 has same chipset as Telus TP2.
I am crossing my fingers that TP2 will support Telus Canadian SIM.
I agree with you points. By seing the bands you mean in windows mobile band selction settings? If so these are always there.
I highly doubt ATT will use the same chipset as Telus since they use the MSM7600 to support both GSM and CDMA. ATT as no need for CDMA.
Also to support my claim:
ATT is RHOD300 device.
I think Telus is RHOD500 and Sprint is RHOD400 (can't find this info but I know 400/500 are both world phone, so it might be the opposit or something)
Different RHODXXX indicates differents innards.
Bottom line I want a TP2 with 3G on Fido so Im crossing my finders too!
Edit:
http://www.engadget.com/2009/06/04/atandts-htc-touch-pro2-hits-the-fcc/
So that's Rhodium 100 for T-Mobile, 400/500 for Sprint and Verizon (or vice-versa) and 300 for AT&T
Noob mistake on my part I think the Rhodium XXX is FCC ...so why did I think Telus was in there =\
Sprint is RHOD400, Verizon and Telus both are RHOD500.

WCDMA Desire

I have a desire in Korea running on a WCDMA sim chip on the SK Telecom network. I'm currently in Canada for a while and would like to not have to use roaming. Is it possible to unlock this phone? Are there android 2.2 roms for this phone? If I do this will it disrupt my service with SKT at all? Korea does things a little differently.
I'd head over to the dev forum where you can find a load of unofficial Froyo ROMs.
You can unlock by either paying for an unlock code online and popping that in when using another SIM or flashing the radio which will require root if I'm correct.
Thanks. Whenever I see posts about the desire its always about gsm phones and my sim says its wcdma. Will these roms work?
WCMDA *is* GSM. More correctly WCDMA is a part of the technology used by most GSM networks to implement 3G.
Regard,
Dave
You're saying that CDMA is the same as GSM? Huh?
cliff_dangers said:
You're saying that CDMA is the same as GSM? Huh?
Click to expand...
Click to collapse
WCDMA and CDMA are not related and completley different.
Dude, you need to go and Google the difference between CDMA and WCDMA or 3G for everyone else out there. Your WCDMA phone is nothing special over the other phones out there
Sent from my HTC Desire using XDA App
WCDMA uses the same system as gsm (uses interchangeable sim cards) but is used on 3g networks running hsdpa because it was found that the old system (tdma) could not cope with the exponential growth of mobile phones and the fact they will consume more of the network's resources. All WCDMA phones are also equipped with old style gsm radio for when there's no 3g coverage. One worry about roaming to north America is that WCDMA uses different frequencies than the rest of the planet but for straightforward phoning and texting and edge you should fine since the 2g bit of the phone is quad band.
Source: cloudy memories from communications technology lessons, please correct me if wrong.
Sent from my HTC Desire using XDA App
huwwatkins said:
WCDMA and CDMA are not related and completley different.
Click to expand...
Click to collapse
Not exactly true! They are very closely related technologies, but the actual implementations are incompatible.
Regards,
Dave

[Q] No data on T-Mobile G2

I got this really cheap T-Mobile G2 in the US which worked perfectly alright and brought it to to my own network overseas. I know the handset uses 3G on a totally different band but I believe edge connection should work, right?
Anyway, I unlocked it using the downgrade method. Then I installed CM7. I put my own sim card and it does pick up signal and I am able to make and receive phone calls but there is no EDGE. I already set the APN options correctly.
Any thoughts?
You sure the APN info is correct for your carrier? Ability to make calls, but no data are pretty good indications of wrong APN.
Yes, as long as the phone has the same GSM bands used by your local carrier, and you are unlocked, you should be able to get data via EDGE.
Isn't there a reason the us has G2 and the rest of the world has desire z? Aren't the bands different between the 2?
Sent from my HTC Vision using XDA Premium App
Spastic909 said:
Isn't there a reason the us has G2 and the rest of the world has desire z? Aren't the bands different between the 2?
Click to expand...
Click to collapse
Just different bands for 3G. Your G2 has the proper GSM (voice and EDGE) to work in most parts of the world.
And the G2 name is just T-Mobile's branding and to signify the vanilla (no Sense) ROM. The Canada, Europe, Asia versions of the Desire Z all have different bands from each other.
redpoint73 said:
You sure the APN info is correct for your carrier? Ability to make calls, but no data are pretty good indications of wrong APN.
Yes, as long as the phone has the same GSM bands used by your local carrier, and you are unlocked, you should be able to get data via EDGE.
Click to expand...
Click to collapse
Completely sure. Used the same sim I use in my main phone which is also android based. Could it be a radio issue? I was tempted to flash a new one but since Im not that familiar with this particular phone I don't feel like messing up, especially when all I want is the phone to work so I can sell it.
BTW, anyone interested PM me - although I believe I shouldn't post this here.

[Q] Verizon G-Nex on AT&T?

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!

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