I was under the impression that LTE would not be supported until Tango or Apollo, but the AT&T Titan II and Lumia 900 will have LTE while running Mango.
Is it something special about AT&T's LTE network that allows this? Or did Mango always support LTE?
If Mango supports LTE, how far off does an LTE WP7.5 device for Verizon seem? (Verizon said that the reason they don't support WP7 is due to lack of 4G LTE)
I'm not sure if 7720 supported LTE, but I think one of the newer releases does.
Mind you, LTE or not, AT&T uses GSM and Verizon uses CDMA, and it may just be that, while both are supported independently, the combination of CDMA with LTE is not yet tested. After all, most of the world uses GSM; CDMA wasn't supported at all until 7389 (NoDo).
GoodDayToDie said:
I'm not sure if 7720 supported LTE, but I think one of the newer releases does.
Mind you, LTE or not, AT&T uses GSM and Verizon uses CDMA, and it may just be that, while both are supported independently, the combination of CDMA with LTE is not yet tested. After all, most of the world uses GSM; CDMA wasn't supported at all until 7389 (NoDo).
Click to expand...
Click to collapse
Does it matter whether the phone uses GSM or CDMA for 2G/3G? LTE is a GSM technology (hence the LTE SIM cards on 4G Verizon phones), so I figured it'd be all the same to the phone.
I'd guess it's the combination of the technologies, since the phones aren't pure LTE. Being able to fall back from LTE to 3G CDMA, or being able to do data on LTE while taking a call on CDMA (something pure CDMA phones can't do at all), probably requires a bunch of extra work and testing.
It's also worth noting that Verizon may just be misleading people. They've shown no particular interest in the Windows Phone brand at all, right from the beginning. Between "Droid"-branded Android devices and iPhones, they don't seen too interested in other platforms.
I want to say yes it does because T-Mobile has 4G Windows phones at their stores.
T-Mobile isn't using LTE yet, though. Their "4G" is really more a "3.5G" technology - it's a faster variant of their 3G, not a completely new tech. It let them bring it to market early and deploy it widely, and it *is* pretty fast, but it's not LTE.
GoodDayToDie said:
T-Mobile isn't using LTE yet, though. Their "4G" is really more a "3.5G" technology - it's a faster variant of their 3G, not a completely new tech. It let them bring it to market early and deploy it widely, and it *is* pretty fast, but it's not LTE.
Click to expand...
Click to collapse
I stand corrected.
Mmkay. So my understanding is that Mango supports LTE on a GSM network (AT&T) as of now, but not LTE mixed with CDMA (Verizon)?
GoodDayToDie said:
I'd guess it's the combination of the technologies, since the phones aren't pure LTE. Being able to fall back from LTE to 3G CDMA, or being able to do data on LTE while taking a call on CDMA (something pure CDMA phones can't do at all), probably requires a bunch of extra work and testing.
It's also worth noting that Verizon may just be misleading people. They've shown no particular interest in the Windows Phone brand at all, right from the beginning. Between "Droid"-branded Android devices and iPhones, they don't seen too interested in other platforms.
Click to expand...
Click to collapse
I guess I have to say on Verizon's defence, They only had a choice of 2 devices, because of their CDMA network. It's Microsoft that limited the options for Sprint and Verizon.
Yes, I do also believe that Verizon has Android and the iPhoney so far up their ass they don't see anything else...BUT, they have released in a Press statement that they would be interested in WP7 if it had LTE options available. Maybe the Lumina 900 would come to verizon...
Maybe we will, maybe we wont...
Waaaait... *Microsoft* limited the devices available to Sprint and Verizon?!? Not Sprint and Verizon themselves, who chose to use a technology almost nobody else in the world uses. Not the OEMs, who didn't build more CDMA-based WP7 devices. No, it was Microsoft, who will license WP7 to anybody who wants it and who have both a CDMA and a GSM version, who are to blame here? I'm confused.
The OEMs are the ones who decide what devices to manufacture. Of course, they do that based on having customers. If Sprint and/or Verizon were to ask for more WP7 devices, you can be sure HTC, LG, Samsung, Nokia, and maybe even Dell, Asus, or Sony Ericson would be willing to provide (Motorola seems to have no interest). Heck, Toshiba/Fujitsu *has* a CDMA/GSM hybrid phone running Mango - it was the first gen2 phone ever released! I'm actually surprised Sprint *hasn't* started importing it; the IS12T is a nice piece of hardware, and would complement the Arrive well.
GoodDayToDie said:
Waaaait... *Microsoft* limited the devices available to Sprint and Verizon?!? Not Sprint and Verizon themselves, who chose to use a technology almost nobody else in the world uses. Not the OEMs, who didn't build more CDMA-based WP7 devices. No, it was Microsoft, who will license WP7 to anybody who wants it and who have both a CDMA and a GSM version, who are to blame here? I'm confused.
Click to expand...
Click to collapse
It's not Sprint and Verizon's fault for choosing CDMA over GSM. They made the decision years ago, before smartphones even existed.
CDMA is actually the smart choice for a big country like the US. Each CDMA radio tower has a larger cover radius than GSM radio towers. Not only that, the call quality is usually better.
And China predominantly uses CDMA. As time passes, CDMA will become more prevalent.
That said, it's not Microsoft's fault, either. The reason there aren't many CDMA WP7 devices is due to OEMs not making many of them.
Pandasaurus said:
It's not Sprint and Verizon's fault for choosing CDMA over GSM. They made the decision years ago, before smartphones even existed.
CDMA is actually the smart choice for a big country like the US. Each CDMA radio tower has a larger cover radius than GSM radio towers. Not only that, the call quality is usually better.
And China predominantly uses CDMA. As time passes, CDMA will become more prevalent.
That said, it's not Microsoft's fault, either. The reason there aren't many CDMA WP7 devices is due to OEMs not making many of them.
Click to expand...
Click to collapse
Thanks, it is this.
Pandasaurus said:
It's not Sprint and Verizon's fault for choosing CDMA over GSM. They made the decision years ago, before smartphones even existed.
CDMA is actually the smart choice for a big country like the US. Each CDMA radio tower has a larger cover radius than GSM radio towers. Not only that, the call quality is usually better.
And China predominantly uses CDMA. As time passes, CDMA will become more prevalent.
That said, it's not Microsoft's fault, either. The reason there aren't many CDMA WP7 devices is due to OEMs not making many of them.
Click to expand...
Click to collapse
Keep in mind, the world is about 90-95% GSM. Microsoft decided to support the world wide standard before they went to CDMA on release(it was publicly stated by Microsoft). So, yes, it is sort of Microsoft's fault why there is only 2 US CDMA models.
OEMs knew this too. Make phones for 90-95% of the world or promote your efforts to a smaller market. It makes total business sense why it was done this way. Windows Phone 7 Didn't even support CDMA till NoDO months later after release.
China's CDMA is not the same as the US CDMA, its almost totaly different, WCDMA, they dont work together, so it's a different chipsets needed.
WIth that being said, Verizon or Sprint could of dumpped money at the project to get more WP7 devices but, with the problems with WM, they held back a little.
So, it's Microsoft and the carriers fault for the lack of CDMA phones. LTE is another thing totaly. We should hear about LTE WP7 phones at WMC coming up very soon.
A release for LTE based CDMA phones is another story....
Pandasaurus said:
CDMA is actually the smart choice for a big country like the US. Each CDMA radio tower has a larger cover radius than GSM radio towers. Not only that, the call quality is usually better.
And China predominantly uses CDMA. As time passes, CDMA will become more prevalent.
Click to expand...
Click to collapse
OK, this is something I will address. There are three large mobile operators in China: China Mobile, China Unicom, and China Telecom.
China Mobile uses GSM/EDGE for 2G and TD-SCDMA for 3G.
China Unicom uses GSM/EDGE for 2G and UMTS for 3G
China Telecon uses CDMA2000 for 2G and EVDO for 3G.
What the local Chinese refer to as "CDMA" is actually W-CDMA which is a UMTS technology.
Pandasaurus said:
If Mango supports LTE, how far off does an LTE WP7.5 device for Verizon seem? (Verizon said that the reason they don't support WP7 is due to lack of 4G LTE)
Click to expand...
Click to collapse
Whether or not Verizon choose to carry LTE Windows Phone is a political issue, not a technical one. Windows Phone does support both LTE and CDMA2000/EVDO.
I found an interesting article about radios and LTE connections. The Radio Performance Disparity of the Galaxy Nexus on GSM and CDMA - Mobile Central - Binary Outcast
I have the oppurtunity to either go with ATT or Verizon. The article makes it seems that GSM is a better bet for LTE phones especially in areas with poor reception. I am hoping people can provide insight/comments on LTE phones for GSM and CDMA carriers and the article.
The Radio Performance Disparity of the Galaxy Nexus on GSM and CDMA
The Samsung Galaxy Nexus. It's Google's flagship phone that is designed to complement the Android 4.0 “Ice Cream Sandwich” operating system software. With high end specifications (for 2011) and highly optimized software, the Galaxy Nexus is supposed to show off what Android can really do without any interference from carriers and OEMs. However, that wound up not truly being the case in the United States with the CDMA/LTE variant for Verizon Wireless and Sprint.
By and large, the CDMA/LTE variant sold by Verizon Wireless and Sprint is the same as the original HSPA+ model that is now sold by Google on the Play Store (at least in terms of hardware). It has the same CPU, RAM, NFC chip, screen, cameras, etc. The only hardware difference is the cellular radio structure.
The original UMTS HSPA+ model uses an Intel XG626 baseband modem that is connected to an antenna structure that supports quad-band GSM and penta-band WCDMA for global usage. For Americans, it means that it works on the HSPA+ networks for both AT&T and T-Mobile USA.
The CDMA/LTE variant uses a VIA Telecom CBP7.1 CDMA2000 baseband modem, connected to an antenna structure that supports dual-band CDMA2000. The Sprint model adds another CDMA2000 band that is exclusive to Sprint. Both CDMA/LTE variants use a Samsung CMC221 LTE baseband modem, but the Verizon Wireless variant is set up for LTE band class 13 (Upper 700MHz C block), while the Sprint variant is set up for LTE band class 25 (U.S. Extended PCS, also known as PCS+G). The Verizon Galaxy Nexus has a user-accessible SIM card slot while the Sprint one does not.
While the Intel (formerly Infineon) baseband used to be troublesome on AT&T's network (as many iPhone users that didn't own an iPhone 4S can attest to), the latest generation of basebands work fine on both AT&T and T-Mobile. With 3GPP Release 7 support, it has a maximum downlink throughput of 21Mbps while it has a maximum uplink throughput of 5.76Mbps. In general, the Galaxy Nexus works very well on AT&T and T-Mobile.
However, it isn't the same for the CDMA variants of the Galaxy Nexus. The VIA Telecom CDMA chip is notorious for weak performance. Other notable devices that use the chip are the Samsung DROID Charge and the Samsung Stratosphere. Searching on the web about these devices turns up a lot of complaints about CDMA service quality with these devices.
Jason Perlow of ZDNet experienced more than his fair share of issues while trying to live off of the 4G LTE connection his Galaxy Nexus provided. But he was trying to live off of 4G LTE, not CDMA2000. So why was he affected? Well, the truth is, CDMA/LTE devices require both radios to be active and connected. Not to mention, network authentication and feature provisioning actually goes through the CDMA system, not the LTE one.
The bridge between CDMA2000 and LTE is rather brittle and is prone to failure, because LTE wasn't designed to be bridged with CDMA2000 like that. It was intended to be installed alongside GSM and WCDMA networks, and it handles it a lot better with those networks. So when something goes wrong in the rather terribly buggy CDMA system, the whole phone can and usually does fail. If Verizon Wireless had upgraded the CDMA2000 system to UMTS HSPA+ like most other CDMA2000 carriers across the globe, it would have avoided dealing with this problem.
Also, the CDMA/LTE Galaxy Nexus lies to you (at least, it does now). Originally, the “bars” that indicate signal strength would actually indicate the signal strength of LTE if it was connected to an LTE network. When everyone started complaining about how weak the signal was compared to the Motorola DROID RAZR and Motorola DROID Bionic, Anandtech investigated. It turned out that the signal strength was actually accurate, and that LTE signals are incredibly weak. Previous devices used the CDMA signal strength to determine how many “bars” of signal you have. The Galaxy Nexus did not. It used the LTE signal strength when it was connected to LTE, and the CDMA signal strength when it wasn't. Verizon Wireless issued an update shortly afterward that changed the behavior to match older LTE devices. Newer LTE devices do the same as well.
Combining the fact that the Galaxy Nexus has to work incredibly hard to maintain an LTE signal with the fact that the CDMA2000 radio is horrible and has a difficult time holding onto the connection will lead anyone to the conclusion that it is a recipe for disaster. Is it any wonder why Jason Perlow and many others have so many problems with the CDMA/LTE version of the Galaxy Nexus? Not really.
Of course, this is excluding all the issues with timely updates that Verizon Wireless has caused for Galaxy Nexus owners. Including this issue just makes the problem worse. There are ways to work around some of the issues, though some workarounds will result in permanent degradation of performance. However, it doesn't mean anything if it takes forever for anyone to get any updates that implement them.
In the end, I really can't solidly recommend the CDMA/LTE version of the Galaxy Nexus to anyone. Nor can I recommend any CDMA2000 device that uses a VIA Telecom CDMA baseband modem. The pitfalls just make it a bad experience for everyone.[
Will the snapdragon S4 chip from Qualcomm help with this issue?
Techno Buffalo has an article about T-Mobiles transition to LTE and a T Mobile person stated that their enhanced backload will help T Mobile's LTE. will this help AT&T's LTE Too? http://www.technobuffalo.com/news/w...backhaul-is-the-key-to-a-users-4g-experience/
Here is another article talking about the challenge CDMA has with LTE when the LTE signal is weak
http://www.phonearena.com/news/How-...-you-dont-need-it-and-save-on-battery_id32990
small error?
Hey didn't have time to read what you wrote but gsm is 2g and wcmda is 3g and 4g and LTE is also 4g so what you wrote did not make much sense GSM WCMDA and LTE are 3 different types of radios and here is a tip lo let people help you faster dont add more to what you wrote edit it instead because now it looks like 3 people already helped you
thanks if it helped :good:
For me this is highly theoretical. I recently moved from Dayton, Ohio to Kingsland, Georgia with a Verizon Galaxy Nexus (CDMA). In both places, if I allowed the LTE radio, the phone would get too hot to handle comfortably, and 3G isn't that great either. But in my neighborhood, there is no AT&T or T-Mobile data signal at all. That severely limits practical choices.
One more http://www.extremetech.com/mobile/110711-what-is-lte/7
Hello
I have found that some people use voice call and text like smartphone on tablets with LTE or 3G connectivity
by loading Custom ROM.
I know that Samsung Galaxy tab and Sony Xperia Z3 Tab compact have a voice call feature, but I am not inclined to
buy those product because I persoanlly boycott those brands.
As far as I made researches about it, some tablets with GSM broadbands can be rooted for their voice calling features.
Among the tablets, Nokia Lumia 2520 LTE on Expansys.com version seems to support GSM network and have a reasonable
price. ( Unlocked Lumia 2520 LTE supports GSM network4: 850 MHz, 900 MHz, 1800 MHz, 1900 MHz)
Can I root Nokia Lumia 2520 for GSM voice call if I install Andorid OS and then loading Custom ROM?
I am sorry for my limited English skill if you struggle with understanding my post, and I will appreciate for your reply.
Hi all,
I've been having a hard time understanding the way CDMA companies work with mobile phones.
In Yemen, there are 4 carrier providers. 3 of which are GSM 2G companies and one which is CDMA LTE company.
The CDMA company is called Yemen Mobile.
Ever since they introduced 3G internet, all mobile devices had to be brought to IT geeks to configure devices to use 3G using DFS, CDMA workshop, or qpst and many other tools.
Now when the company introduced LTE, the same thing happened, people had to bring their devices to IT geeks working on shops to have them configure their mobile devices.
Standard configuration through mobile access points does not always work.
When I traveled to eygpt, I got a vodaphone SIM card and once I inserted the SIM, everything was configured automatically.
What is other companies worldwide have that Yemen Mobile doesn't?
This is frustrating. When I turn LTE data on, my phone becomes out of reach. I can't receive calls on as IT geeks say my phone cpu is snapdragon and I used the same phone in Eygpt with 4g working like a charm.
Can anybody explain?
UltimateX29 said:
Hi all,
I've been having a hard time understanding the way CDMA companies work with mobile phones.
In Yemen, there are 4 carrier providers. 3 of which are GSM 2G companies and one which is CDMA LTE company.
The CDMA company is called Yemen Mobile.
Ever since they introduced 3G internet, all mobile devices had to be brought to IT geeks to configure devices to use 3G using DFS, CDMA workshop, or qpst and many other tools.
Now when the company introduced LTE, the same thing happened, people had to bring their devices to IT geeks working on shops to have them configure their mobile devices.
Standard configuration through mobile access points does not always work.
When I traveled to eygpt, I got a vodaphone SIM card and once I inserted the SIM, everything was configured automatically.
What is other companies worldwide have that Yemen Mobile doesn't?
This is frustrating. When I turn LTE data on, my phone becomes out of reach. I can't receive calls on as IT geeks say my phone cpu is snapdragon and I used the same phone in Eygpt with 4g working like a charm.
Can anybody explain?
Click to expand...
Click to collapse
We all r out of luck until we get out of this goddamned place
UltimateX29 said:
Hi all,
I've been having a hard time understanding the way CDMA companies work with mobile phones.
In Yemen, there are 4 carrier providers. 3 of which are GSM 2G companies and one which is CDMA LTE company.
The CDMA company is called Yemen Mobile.
Ever since they introduced 3G internet, all mobile devices had to be brought to IT geeks to configure devices to use 3G using DFS, CDMA workshop, or qpst and many other tools.
Now when the company introduced LTE, the same thing happened, people had to bring their devices to IT geeks working on shops to have them configure their mobile devices.
Standard configuration through mobile access points does not always work.
When I traveled to eygpt, I got a vodaphone SIM card and once I inserted the SIM, everything was configured automatically.
What is other companies worldwide have that Yemen Mobile doesn't?
This is frustrating. When I turn LTE data on, my phone becomes out of reach. I can't receive calls on as IT geeks say my phone cpu is snapdragon and I used the same phone in Eygpt with 4g working like a charm.
Can anybody explain?
Click to expand...
Click to collapse
This is the main issue of CDMA companies with mobile phones. In the previous week I went for a tour out of the CDMA range and due to out of the range I haven't even open my website on phone to check it progress because of the net issue. When you switch from one mode to another so it stop even opening browsers.
UltimateX29 said:
Hi all,
I've been having a hard time understanding the way CDMA companies work with mobile phones.
In Yemen, there are 4 carrier providers. 3 of which are GSM 2G companies and one which is CDMA LTE company.
The CDMA company is called Yemen Mobile.
Ever since they introduced 3G internet, all mobile devices had to be brought to IT geeks to configure devices to use 3G using DFS, CDMA workshop, or qpst and many other tools.
Now when the company introduced LTE, the same thing happened, people had to bring their devices to IT geeks working on shops to have them configure their mobile devices.
Standard configuration through mobile access points does not always work.
When I traveled to eygpt, I got a vodaphone SIM card and once I inserted the SIM, everything was configured automatically.
What is other companies worldwide have that Yemen Mobile doesn't?
This is frustrating. When I turn LTE data on, my phone becomes out of reach. I can't receive calls on as IT geeks say my phone cpu is snapdragon and I used the same phone in Eygpt with 4g working like a charm.
Can anybody explain?
Click to expand...
Click to collapse
The CDMA technology approximately dead because the US Carriers which introduced it transfer its towers to a new LTE technology and uses VoLTE for voice calls.
In Yemen the situation is different because the company (Yemen Mobile) hasn't upgraded its equipment since CDMA/EVDO first days, and now the company want to be the first to introduce LTE services but it fails until now because the compatibility and their towers does not configured with right settings.
I have Galaxy S20 FE 5G from US cellular, I inserted a 4G sim to it, it's either works in CDMA or LTE modes.
can't work at the same time.
I tried to play with some settings in DFS but I finished with neither LTE data nor CDMA signal.
but luckily I restored EFS2 and now working either CDMA or LTE.
There is another carrier (GSM based) in Yemen called (YOU) just add the Access point to the phone and it will work immediately.