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I recently saw that the HTC Thunderbolt will support simultaneous 1X Voice and EV-DO Data (SVDO 3G). Does anybody know if existing phones such as the Fascinate can support this?
I don't think fascinate does that.
I believe the phone requires special hardware to be able to support SVDO, which the Fascinate probably lacks.
Possibly, but we're likely missing a crap load of software that would be required for it to work, and potentially hardware. Feel free to look into getting it to work on our phones as well. I'm sure many people would like to know how it's done.
Isn't this one of the perks of being on GSM network? Afaik, LTE is a GSM technology, and therefore would support SVDO.
Sent from my SCH-I500 using XDA App
SVDO means that the phone supports simultaneous 1x voice and EVDO data. Has nothing to do with LTE as far as I know.
papstar said:
Isn't this one of the perks of being on GSM network? Afaik, LTE is a GSM technology, and therefore would support SVDO.
Sent from my SCH-I500 using XDA App
Click to expand...
Click to collapse
No, this is called SVDO, basically it take's two radio's so it can run 1X which is the CDMA2000 voice standard and EVDO which is the CDMA2000's 3G evolution and run both at the same time which previous radio's couldn't. Nothing to do with LTE.
Also LTE isn't GSM, it's an evolution of UMTS. GSM cannot do simultaneous voice and data, only 3G UMTS/HSPA can achieve that.
No, at the moment the thunderbolt is the only phone on verizon capable of SDVO.
I got my tbolt on launch day, but I don't have lte service in my area so I'm on the ehrpd network 99% of the time.
When I first got the phone I got really impressive ehrpd speeds 2.5 mbps and 1.3 - 1.5 mbps up.
Now after months of lte phones being out I get 1.3 Max and 800 up.
I know that ehrpd is the same as far as maximum speed, but I'm wondering of anyone else has noticed this slowdown in 3g areas, possibly caused by more users on ehrpd
Sent from my ADR6400L using XDA App
movielover76 said:
I got my tbolt on launch day, but I don't have lte service in my area so I'm on the ehrpd network 99% of the time.
When I first got the phone I got really impressive ehrpd speeds 2.5 mbps and 1.3 - 1.5 mbps up.
Now after months of lte phones being out I get 1.3 Max and 800 up.
I know that ehrpd is the same as far as maximum speed, but I'm wondering of anyone else has noticed this slowdown in 3g areas, possibly caused by more users on ehrpd
Sent from my ADR6400L using XDA App
Click to expand...
Click to collapse
EHRPD (evolved high rate packet data) is a protocol subset of cdm2000, which is the network. NOT EHRPD. HRPD is implemented in 1xRTT evolved networks such as EV-DO rev.0 and 1 in order to break from a switch based network to a packet based network. EHRPD is supposed to support hand-over from CDMA networks to LTE networks, however, Verizon hasn't widely implemented EHRPD so far as I can tell. I RARELY see a hand-off of an active data session back or forth from CDMA to LTE.
The only things that would really effect your speeds over a CDMA network would be the backing network of the base station (tower) or user base in the cell. I don't believe Verizon throttles that data. They certainly don't throttle data on LTE.
loonatik78 said:
EHRPD (evolved high rate packet data) is a protocol subset of cdm2000, which is the network. NOT EHRPD. HRPD is implemented in 1xRTT evolved networks such as EV-DO rev.0 and 1 in order to break from a switch based network to a packet based network. EHRPD is supposed to support hand-over from CDMA networks to LTE networks, however, Verizon hasn't widely implemented EHRPD so far as I can tell. I RARELY see a hand-off of an active data session back or forth from CDMA to LTE.
The only things that would really effect your speeds over a CDMA network would be the backing network of the base station (tower) or user base in the cell. I don't believe Verizon throttles that data. They certainly don't throttle data on LTE.
Click to expand...
Click to collapse
So are you saying EHRPD towers are similar to LTE towers? Or am I way the hell off?
ghstrdr1985 said:
So are you saying EHRPD towers are similar to LTE towers? Or am I way the hell off?
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Click to collapse
ehrpd resides in the towers with lte and helps with the handoff between going from 4g back to 3g. how many towers currently have it? I do not know, but I'd say not that many.
ghstrdr1985 said:
So are you saying EHRPD towers are similar to LTE towers? Or am I way the hell off?
Click to expand...
Click to collapse
I'm saying there's not such thing as an EHRPD tower. You've got CDMA towers and you've got LTE. These technologies are VERY different. Let me try to break this down. I probably should have explained it better above.
First, for the record, for cost considerations, LTE and CDMA for Verizon come off the same physical towers. There's not much point in erecting different towers for different antennas if they're still physical space on existing towers.
So... from the beginning...
Verizon runs to completely separate networks today. One is based on CDMA technology, one on LTE. Let me start first with CDMA.
CDMA, otherwise known as Code Division Multiple Access, is a method of physically transmitting a signal to and from a device. Verizon implements asynchronous CDMA to avoid issues with doppler shift in the signal frequency and speed of light delay from transmission to reception. CDMA is the radio access technology, NOT the protocol. The protocol is a patented technology known as cdma2000 and uses the CDMA radio access method as it's base layer.
cdma2000 is the protocol and encompasses a number of transmission protocols. Those would include IS-95, 1xRTT, 1xEV-DO, and the 1xEV-DO revisions 0, A, and B. To clarify, 1xEV-DO stands for single channel evolved-data optimized. EHRPD is a subset data transmission protocol of revision A of 1xEV-DO. I believe that Verizon didn't implement EHRPD very widely in it's deployment of EV-DO rev.A because at the point of first introduction their path of evolution was undecided. They very well could have moved on with EV-DO rev. B and attained speeds comparable to WiMax while being able to upgrade many of the existing CDMA handsets with new firmware to utilize the newer revision, just as had been done when rev. A came. One of the issues with cdma2000 is that the protocols aren't compatible. EV-DO used to stand for Evolution-Data Only, because data is all it does. When the devices is used for a voice call, it must switch protocol modes back to IS-95 to interface with the switch-based voice network on the backside of the tower. This is why CDMA devices cannot do data while in call.
LTE is a completely different technology altogether. It's an evolution of GSM, and accordingly, expands upon the basic technology of GSM. The base of GSM is TDMA, Time Division Multiple Access. Each device has a time slot that it's allowed to transmit or receive data on, usually a small fraction of a second. LTE also makes use of FDMA, Frequency Division Multiple Access, meaning that there are many frequencies that can be used to address different devices.
LTE makes uses of protocols, some similar to GSM protocols, to transmit and receive data. These are described in the LTE specification, and as time passes, additional LTE protocol specifications will be added, such as LTE Advance.
The goal of Verizon is to have a pure LTE network in the future. LTE is not simply a data transmission technology, but rather a full blown cellular standard just as GSM is, and as such can carry voice. When it does, voice will be basically VoIP, as LTE is a completely packet based technology and doesn't depend upon network switching (unlike IS-95 and 1xRTT, which is still the voice carrier technology supported by cdma2000). Carriers like this because it makes upgrading and scaling the network easier. The end result will be a more seamless user experience and the ability to integrate native voice features into data features of the device.
Modern LTE devices accomplish voice and data by using 2 different radios. In the Thunderbolt, that would be the CDMA radio built into the MSM8655 Soc processor and the MDM9600 LTE modem chip. Currently, this is the ONLY combination of chips that allows full simultaneous voice and data over the entire network. Unless the LTE chip of the devices handles both CDMA and LTE, AND can interlink with the SoC radio to manage SAR power limits, this will remain the case. Currently, only Qualcomm chipsets accomplish this, making the Thunderbolt the most functionally connected device ever sold on Verizon.
If anyone is interested in knowing more, let me know. I'll write up a bit more in-depth primer on these subjects and post it.
Thanks
Sorry, I did post this in the wrong forum, and as such I deserve some flaming lol.
I've been around here for a little while since jan 2011, it was just a brainfart.
I know I am connected to ehrpd because under about phone it says cdma - ehrpd
I'm just a little south, maybe 6 miles for the LTE market in Northern NJ, I was just wondering if anyone else in a 3G area experienced a similar slowdown.
I bought a 4G handset knowing it might be awhile before i get LTE, because I was concerned about being stuck in a tiered data plan when I upgraded to 4G, turned out not to be an issue, but I'm still happy I got it, it's a great phone
and I do use LTE occasionally like when to school.
Thanks for all the replies, and if theirs any other oddballs in a 3G area most of the time with a thunderbolt, let me know if you've experienced anything similair
loonatik78 said:
I'm saying there's not such thing as an EHRPD tower. You've got CDMA towers and you've got LTE. These technologies are VERY different. Let me try to break this down. I probably should have explained it better above.
First, for the record, for cost considerations, LTE and CDMA for Verizon come off the same physical towers. There's not much point in erecting different towers for different antennas if they're still physical space on existing towers.
So... from the beginning...
Verizon runs to completely separate networks today. One is based on CDMA technology, one on LTE. Let me start first with CDMA.
CDMA, otherwise known as Code Division Multiple Access, is a method of physically transmitting a signal to and from a device. Verizon implements asynchronous CDMA to avoid issues with doppler shift in the signal frequency and speed of light delay from transmission to reception. CDMA is the radio access technology, NOT the protocol. The protocol is a patented technology known as cdma2000 and uses the CDMA radio access method as it's base layer.
cdma2000 is the protocol and encompasses a number of transmission protocols. Those would include IS-95, 1xRTT, 1xEV-DO, and the 1xEV-DO revisions 0, A, and B. To clarify, 1xEV-DO stands for single channel evolved-data optimized. EHRPD is a subset data transmission protocol of revision A of 1xEV-DO. I believe that Verizon didn't implement EHRPD very widely in it's deployment of EV-DO rev.A because at the point of first introduction their path of evolution was undecided. They very well could have moved on with EV-DO rev. B and attained speeds comparable to WiMax while being able to upgrade many of the existing CDMA handsets with new firmware to utilize the newer revision, just as had been done when rev. A came. One of the issues with cdma2000 is that the protocols aren't compatible. EV-DO used to stand for Evolution-Data Only, because data is all it does. When the devices is used for a voice call, it must switch protocol modes back to IS-95 to interface with the switch-based voice network on the backside of the tower. This is why CDMA devices cannot do data while in call.
LTE is a completely different technology altogether. It's an evolution of GSM, and accordingly, expands upon the basic technology of GSM. The base of GSM is TDMA, Time Division Multiple Access. Each device has a time slot that it's allowed to transmit or receive data on, usually a small fraction of a second. LTE also makes use of FDMA, Frequency Division Multiple Access, meaning that there are many frequencies that can be used to address different devices.
LTE makes uses of protocols, some similar to GSM protocols, to transmit and receive data. These are described in the LTE specification, and as time passes, additional LTE protocol specifications will be added, such as LTE Advance.
The goal of Verizon is to have a pure LTE network in the future. LTE is not simply a data transmission technology, but rather a full blown cellular standard just as GSM is, and as such can carry voice. When it does, voice will be basically VoIP, as LTE is a completely packet based technology and doesn't depend upon network switching (unlike IS-95 and 1xRTT, which is still the voice carrier technology supported by cdma2000). Carriers like this because it makes upgrading and scaling the network easier. The end result will be a more seamless user experience and the ability to integrate native voice features into data features of the device.
Modern LTE devices accomplish voice and data by using 2 different radios. In the Thunderbolt, that would be the CDMA radio built into the MSM8655 Soc processor and the MDM9600 LTE modem chip. Currently, this is the ONLY combination of chips that allows full simultaneous voice and data over the entire network. Unless the LTE chip of the devices handles both CDMA and LTE, AND can interlink with the SoC radio to manage SAR power limits, this will remain the case. Currently, only Qualcomm chipsets accomplish this, making the Thunderbolt the most functionally connected device ever sold on Verizon.
If anyone is interested in knowing more, let me know. I'll write up a bit more in-depth primer on these subjects and post it.
Click to expand...
Click to collapse
Man that is a mouthful. However, the Thunderbolt can talk & surf the web in 3G mode, not just LTE. So LTE will be a competition for GSM in the coming years?
Sent from my ADR6400L using xda premium
ghstrdr1985 said:
Man that is a mouthful. However, the Thunderbolt can talk & surf the web in 3G mode, not just LTE. So LTE will be a competition for GSM in the coming years?
Sent from my ADR6400L using xda premium
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Click to collapse
it'll be the 4th generation of GSM (4g).
ghstrdr1985 said:
Man that is a mouthful. However, the Thunderbolt can talk & surf the web in 3G mode, not just LTE. So LTE will be a competition for GSM in the coming years?
Sent from my ADR6400L using xda premium
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Click to collapse
That's what I said. Its because the Tbolt has 2 cdma radios.
loonatik78 said:
That's what I said. Its because the Tbolt has 2 cdma radios.
Click to expand...
Click to collapse
This phone has sooo much potential but is inhibited by Verizon.
Sent from my ADR6400L using xda premium
Hello,
Evo 3D uses SQN1210 WiMax chip which supports 3 WiMax bands.
Including the one I need (3.3-3.8 GHz).
I found some ways to change frequencies in 2.3 and 2.5 GHz bands.
IE:
unzipping the PC36IMG.zip file
open system.img using a hex editor program and replace each occurence of 2647000, 2657000 and 2667000 with alternate frequencies. There are 2 or 3 occurrences of each of these 3 numbers
re-zip the files into an new version of PC36IMG.zip
complete the simple root process using this new version of PC36IMG.zip
I wonder, is it safe to try this in 3.3 GHz band?
Damn, found that this is for Evo 4G...
Anyway, is there some way to change those bands?
Even if you could change the frequencies, I'm not sure what that would do for you, as the wimax on this phone can only be used with sprint towers.
Really?
As I have the GSM model...
bmaggot said:
Really?
As I have the GSM model...
Click to expand...
Click to collapse
If you could get the frequencies to work, there may be other steps. Some people have figured out how to get off of the Sprint WiMax and onto Clearwire.
Although, if you have the EVO 3D GSM, there is no WiMax radio in it. This becomes moot.
Although, if you have the EVO 3D GSM, there is no WiMax radio in it. This becomes moot.
Click to expand...
Click to collapse
Yep, which is why I assumed you had the CDMA model.
My name is Carola and I am a Technical Support Agent for the HTC Written Team.
I understand you would like to know if Evo 3D GSM model supports Wimax beares.
I can help you with that, it does support Wimax.
Click to expand...
Click to collapse
I wonder if "beares" is some kind of female bear.
Maybe "bearer"...
bmaggot said:
I wonder if "beares" is some kind of female bear.
Maybe "bearer"...
Click to expand...
Click to collapse
Don't know where that came from, but the KDDI and Sprint Shooter variants support WiMax, however the gsm do not have a WiMax radio. Anyone who tells you different does not know what they are talking about.
Alright soooooo, the cell phone tower by my mouse is barely functioning right now, sprint says there's 2 tickets open, and that Data is at 0% capacity and voice is only at 68%. Anything below 96% is bad according to them, to make a long story short, I have no data, texts will not send, and making calls is a crap shoot. most the time you get the message that says all circuits are busy.
Seeing as there's no root for the ".3" firmware, please correct me if I'm wrong, I did the the *#*#info#*#* and changed my cellular band to 800MHz band and I'm now running on Verizon according to not roam control.
My question is...I know Verizon uses 800MHz for LTE, is this band also used for voice and text too? and why hasn't sprint taken advantage of the 800MHz band before the LTE rollout. AND How can verizon have LTE and CDMA both in 800MHz?
I got the same song and dance from Sprint, and eventually, after I complained enough, I got a free AIRAVE.
About 800 MHz, it might be like ssh tunnelling on port 22, in that these different protocols may be able to function concurrently on that band. Not sure.
Are your towers LTE? Mine will be after the upgrade in North Hollywood. At that juncture, Sprint may be forced to operate on the higher bands.
Sent From My S-OFFed, R00ted, 100% Tricked-Out HTC Evo 4G LTE via XDA Premium!
No mine are stillk evDo towers, I'm in Arizona so LTE is a while away. I wonder why sprint hasn't used 800MHz before like verizon has?
And by "Forced to operate on Higher bands", you mean lower right? because 800 is lower than 1900
Yes, that's what I meant, sorry. LOWER bands. Yes, I'm sleep-deprived... I admit it. =P
Sent From My S-OFFed, R00ted, 100% Tricked-Out HTC Evo 4G LTE via XDA Premium!
No problem! Also, do you know what sprint will do with the 800MHz spectrum? I know the box for my phone says it's able to connect to 800MHz CDMA
800mhz is currently being used by Nextel towers. Those towers are also being decommissioned, with the final tower being taken offline in 2013. 800mhz will be used for LTE only on sprint(if i recall correctly), so although this phone is capable of 800mhz CDMA, i do not believe it will be valuable asset as there will be no 800mhz CDMA broadcast.
As soon as the new Sprint LTE towers are up, I will be attempting to use a full spectrum analyzer, and remote performance and capacity planning tools to gauge overall health, bandwidth, etc.
I assume that security will be put in place to prevent such data and metrics from being culled, but it is worth a shot.
I will publish results here when the LTE towers are in. I'll know they are officially in production before Sprint drops a press release, as my handsets will actually work in my office without using an AIRAVE. =P
Sent From My S-OFFed, R00ted, 100% Tricked-Out HTC Evo 4G LTE via XDA Premium!
the cpu of EVO 3D gsm vertion is 8660 or 8260??
and if it is 8660, it means that EVO 3D could support 3 network types including GSM WCDMA and CDMA.
is there any one have a method to make EVO 3D gsm vertion to support CDMA???
thx
doubleone said:
the cpu of EVO 3D gsm vertion is 8660 or 8260??
and if it is 8660, it means that EVO 3D could support 3 network types including GSM WCDMA and CDMA.
is there any one have a method to make EVO 3D gsm vertion to support CDMA???
thx
Click to expand...
Click to collapse
The Evo 3D is a msm8660 processor device, but the GSM version cannot work on a CDMA network due to the radio band frequency. That's in simplest form.
私のEVO 4G LTEから送信される。
doubleone said:
the cpu of EVO 3D gsm vertion is 8660 or 8260??
and if it is 8660, it means that EVO 3D could support 3 network types including GSM WCDMA and CDMA.
is there any one have a method to make EVO 3D gsm vertion to support CDMA???
thx
Click to expand...
Click to collapse
Here are the specifications for the GSM Evo 3D. The radios are all based on GSM technology and the phone would require different radio hardware to support CDMA.
ramjet73
ramjet73 said:
for the GSM Evo 3D. The radios are all based on GSM technology and the phone would require different radio hardware to support CDMA.
ramjet73
Click to expand...
Click to collapse
My major is microelectronics. As i knows,the radio hardware is integrated in SOC(system on chip) which is MSM8660. is it right? if so , can we flash the radio to solve this problem?
dastin1015 said:
The Evo 3D is a msm8660 processor device, but the GSM version cannot work on a CDMA network due to the radio band frequency. That's in simplest form.
私のEVO 4G LTEから送信される。
Click to expand...
Click to collapse
I had used the rom that you developed. is it possible to solve the problem by flash radio? because the band chip is integrated in 8660.
ramjet73 said:
Here are the specifications for the GSM Evo 3D. The radios are all based on GSM technology and the phone would require different radio hardware to support CDMA.
ramjet73
Click to expand...
Click to collapse
The specs on gsmarena are mostly incomplete or sometimes wrong. The GSM evo 3d has MSM8260 chipset and CDMA has MSM8660 or is it region dependent?
Im not sure but according to some sources gsm has 8260
@OP
MSM8xxxs' are chipsets. The CPU is Scorpion.
And
No the GSM 3D does not have the hardware to support CDMA but the CDMA 3D has hardware (except sim slot, software, f/w, software radio) to support GSM.
mnomaanw said:
The specs on gsmarena are mostly incomplete or sometimes wrong. The GSM evo 3d has MSM8260 chipset and CDMA has MSM8660 or is it region dependent?
Im not sure but according to some sources gsm has 8260
@OP
MSM8xxxs' are chipsets. The CPU is Scorpion.
And
No the GSM 3D does not have the hardware to support CDMA but the CDMA 3D has hardware (except sim slot, software, f/w, software radio) to support GSM.
Click to expand...
Click to collapse
This is correct. MSM8660 has support for HSPA+ as well as other GSM frequencies. It has no sim attached to the chipset altought there is a mount point for it. I read on another forum some time ago that a real computer genius was able to hack the 8660 to recognize GSM but that was it because without the things mnomaanw mentioned all it could do was recognize the signal.
The MSM8260 that is in the Sensation and EVO 3D GSM version have no CDMA radio at all.
---------- Post added at 10:36 AM ---------- Previous post was at 10:29 AM ----------
raptoro07 said:
This is correct. MSM8660 has support for HSPA+ as well as other GSM frequencies. It has no sim attached to the chipset altought there is a mount point for it. I read on another forum some time ago that a real computer genius was able to hack the 8660 to recognize GSM but that was it because without the things mnomaanw mentioned all it could do was recognize the signal.
The MSM8260 that is in the Sensation and EVO 3D GSM version have no CDMA radio at all.
Click to expand...
Click to collapse
PDADB.net is the best source for this kind of info I find. Here you can see the different versions of the Shooter or EVO 3D. Basically there are 2 GSM versions that use the 8260, the Sprint version uses 8660, and the KDDI version uses the 8660 as they use some CDMA in Japan I think.
raptoro07 said:
PDADB.net is the best source for this kind of info I find. Here you can see the different versions of the Shooter or EVO 3D. Basically there are 2 GSM versions that use the 8260, the Sprint version uses 8660, and the KDDI version uses the 8660 as they use some CDMA in Japan I think.
Click to expand...
Click to collapse
Perhaps the chipset in the GSM Evo 3D varies by model or region then because the CyanogenMod table of devices also shows it as an MSM8660, but that may just be for software compatibility. The XDA specifications do reflect the MSM8260 for the GSM model.
ramjet73
Well, the only difference is CDMA, so it doesn't really matter which chip it has.
Sent from my Evo 3D GSM using Tapatalk 2