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Government report finds LightSquared's LTE interferes with GPS -- color us surprised
http://www.engadget.com/2011/06/10/government-report-finds-lightsquareds-lte-interferes-with-gps/
you could link to actual relevant sources (listed with the link) and not engadget. they dont even report news, they just index index and write a short paragraph. I hate giving them traffic since they dont really do much.
Huh, who would have thunk it. Will there be a "patch" the the network now?
Actually my professor for my electromagnetics class was hired to fix this issue directly, and left after this semester to go work on it. He spoke a little about it but basically there will be a "shield" put up around the towers when they recognize GPS signals and sort of "saturate" the LTE signal to prevent gps drops, a sort of automatic interference detector.
However the radius for the gps issues is rather small, and not a problem for most yet. Also the reason for this is because Lightsquared uses frequencies that are directly next to the same frequencies used for GPS.
All in all, don't sweat it, its already being fixed, and if you knew my professor, it will work in the end He taught me everything I know about anything that travels through the air.
I hope he fixes the problem--I get lost a lot so GPS is a must have!
I was under the impression that LightSquared beamed the signal from space and that is why it interferes with GPS.... Verizon LTE does not work like LightSquared....
awwilson21 said:
I was under the impression that LightSquared beamed the signal from space and that is why it interferes with GPS.... Verizon LTE does not work like LightSquared....
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Yea, Verizon doesn't use LightSquared's LTE tech. In fact, nobody does yet. This thread is completely irrelevant.
HI
arunningpir8 said:
Actually my professor for my electromagnetics class was hired to fix this issue directly, and left after this semester to go work on it. He spoke a little about it but basically there will be a "shield" put up around the towers when they recognize GPS signals and sort of "saturate" the LTE signal to prevent gps drops, a sort of automatic interference detector.
However the radius for the gps issues is rather small, and not a problem for most yet. Also the reason for this is because Lightsquared uses frequencies that are directly next to the same frequencies used for GPS.
All in all, don't sweat it, its already being fixed, and if you knew my professor, it will work in the end He taught me everything I know about anything that travels through the air.
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Ill be happier if the find a magnetic monopole...classical electrodynamics just begs for that missing symmetry.
Sent from my ADR6400L using XDA App
awwilson21 said:
I was under the impression that LightSquared beamed the signal from space and that is why it interferes with GPS.... Verizon LTE does not work like LightSquared....
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The problem will be with the ground stations they want to install (if and when). The aviation community is just as concerned. See this link for more details: http://www.flyingmag.com/news/new-report-intensifies-lightsquared-vs-gps-fight
http://arstechnica.com/tech-policy/news/2011/04/lightsquared-broadband-a-threat-to-gps.ars
Is it possible to connect to another carriers tower such as sprint or uscellular. Reason being at work in our shop I constantly switch from 1x 3g and 4g and this just wrecks my battery life. Is there anything I can flash to do this if it is possible?
Sent from my Rooted Galaxy S3 using Tapatalk 2
I believe you can only do this only by subscribing to the other carrier's service.
What you can easily do is to try to improve the signal path between your carrier's system to your phone.
One way to do this is by not placing the phone on your body and instead placing it someplace with a good exposure to the outside like in a window sill (with no metal blinds).
You mentioned "shop". I envision a mostly metal building with few is any windows. This type of building is pretty good at shielding phone signals.
Our shop has no windows. Certain spots of the shop I can get 4g but where I work at and keep my phone is always spotty.
Sent from my Rooted Galaxy S3 using Tapatalk 2
I spend a lot of time in a convention center, aka concrete box, for work. This phone gets really bad reception when I am at work. I can connect to wi-fi so data is not a problem. But i miss so many calls it is ridiculous. And to add to the pain I do not get good reception at my house. I have talked to Sprint and they look at the coverage map, then tell me my home and work have great cell coverage. Might as well talk to a wall. At my house I have an Airave, still drop calls left and right. I am rooted, debloated, but not running any custom rom. Is there something I am missing? Like the phone, actually love having a physical keyboard, but am going nuts with the poor cell reception. Do other phones, Galaxy S4, have any better cell reception? Or do all Sprint phones have similar antennaes in them? Any help would be appreciated. Thanks in advance
I think the phone's antenna is a really bad one. I live in germany and I've got a sim-modded one from cornholio. when other phones get weak reception my phone gets "no service" (same provider). inside buildings it can get really annoying. I'm so glad I live in a major city xD
Sent from my XT897 using XDA Premium 4 mobile app
comstyle said:
I think the phone's antenna is a really bad one. I live in germany and I've got a sim-modded one from cornholio. when other phones get weak reception my phone gets "no service" (same provider). inside buildings it can get really annoying. I'm so glad I live in a major city xD
Sent from my XT897 using XDA Premium 4 mobile app
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I've noticed this phone always wants to connect @ 3G. Try switching to 2G. It doesn't matter for calls so why not use it as a workaround? When I need fast internet I just toggle back to 3G.
I've got an automatic 2g/3g toggling app installed. so I talk about bad 2g reception xD
thanks for the recommendation anyway
Sent from my Nexus 7 using XDA Premium 4 mobile app
comstyle said:
I've got an automatic 2g/3g toggling app installed. so I talk about bad 2g reception xD
thanks for the recommendation anyway
Sent from my Nexus 7 using XDA Premium 4 mobile app
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I have that same issue, and when im on 2G and lost signal phone never catch signal back, best and only option is keep turn on 3G but area where we use phone must be with good coverage.
But ... i have second photon moded in PL in diffrent way and this phone dont have this issue with signal 2G and also have better 3G signal.. but realization not looks so good its uglier (and slot for sim is not push-to-push )
Welcome to Sprint. I've gone through 4 different phones they all can't be Bad.
Sent from my PHOTON Q using XDA Premium 4 mobile app
its sprint service, I live In michigan near detroit and out here sprint blowz I modded my photon with The aid of Cornholios Mod, and currently using it on straight talk with an AT&T sim service is nearly as good as Verizons, save for the CM10.2.1 3G handshaking Problem and the Buggy CM everyday issues, but the Cell service couldnt be better under AT&T, Id say stick to a reseller of their service and u will see a vast service improvement
Why start a new thread?
I had one of these back in October when I moved to Colorado. I don't quite recall, but I'm pretty sure my service was okay. I am now on my second Q since the first one started having pixelated display issues, and nothing I could do would fix it...I eventually took the thing apart trying to get to the connections, and while successful, I still ended up with crappy display so I am thinking there was an issue with something on the board.
Now i have a 'new' one and for the life of me I get 3g service maybe once or twice a day. I was thinking about bootloader unlock and flashing to a different ROM. I'd also like to find a way to see 'real-time' what the different radios are doing/not doing.
So what do you all think? New ROM?
I have had this issue with a few of my phones over the years. Especially the HTC Touch Pro 2 (Rhodium).
In the Sim Modding Process it is possible that a few of the connectors on the mother board to get slightly bent and loose contact with the (black brass stick on ribbons that are stuck to the outside of the phone body. If you take the phone back panel off you will see these ribbons, they are stuck on the case around the battery.
I have some photo's of where the aerials are on the Photon but need to get to 10 posts before I can post them.
There is four different sets of aerials (Data Main, Voice Main, Bluetooth Wifi and GPS) pull your phone apart and make sure the contact on the mother board are in full contact with the ribbons. Do this by bending them up, when you put the phone back together they should be pushing hard on the contacts again.
Why is it that the hotspot turns off during cellular calls?
This wasn't an issue with the Note 3 on Sprint.
mrnamster said:
Why is it that the hotspot turns off during cellular calls?
This wasn't an issue with the Note 3 on Sprint.
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Because data/LTE does not work over calling, feature of tri-band. LTE/3G disconnect during calls because of switching system.
Thanks for the explanation. Tri-band is Sprint Spark right? Now I'm thinking of going back to my Note 3..
mrnamster said:
Thanks for the explanation. Tri-band is Sprint Spark right? Now I'm thinking of going back to my Note 3..
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Yes, sprint spark. All phones are going to this anyways for sprint, no workaround quite yet.
Definitely seems like a deal breaker for me idk i have terrible Spark/LTE service i have the bars etc but get 3-5mbps on every speed test.... I dont understand other then that im always on wifi tho
Yeah, it makes me want to go back to my N3. I wish I knew this before.
There's another thread regarding this issue http://forum.xda-developers.com/showthread.php?t=2715529
Let's close this thread and continue the conversation over there.
RevelationOmega said:
Because data/LTE does not work over calling, feature of tri-band. LTE/3G disconnect during calls because of switching system.
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that's really stupid because the s3 had it over 3g and 4g, and the s4 had it over 4g....and now the s5 not at all.....thanks sprint/samsung
Glitterloveglamour said:
that's really stupid because the s3 had it over 3g and 4g, and the s4 had it over 4g....and now the s5 not at all.....thanks sprint/samsung
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Currently working now on Wifi calling and UNrestricting Download Booster limits now that its working. Maybe well take a look into what we can do about it but it seems we may have no choice because ALL sprint phones will become tri-band and lose that feature, towers switch fallback circuit which restricts the phone, we may not be able to work around. As I said, have to look into it afterwards.
RevelationOmega said:
Currently working now on Wifi calling and UNrestricting Download Booster limits now that its working. Maybe well take a look into what we can do about it but it seems we may have no choice because ALL sprint phones will become tri-band and lose that feature, towers switch fallback circuit which restricts the phone, we may not be able to work around. As I said, have to look into it afterwards.
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gosh hopefully!!
this should clear up once VoLTE is out. when that is, I have no clue
Sent from my SM-G900P using Tapatalk
Mine is working fine, no issues - also tested w/ incoming calls.
Here is an article talking about Fallback Circuit tech and what is Sprint Spark/Triband Technology
http://s4gru.com/index.php?/blog/1/...-due-to-circuit-switched-fallback-technology/
explains some things as well as VoLTE not quite possible yet.
The decision for Tri-Band devices was not predicated around SVLTE. It was decided on other, more important factors.
*
1. The main reason was for single radios. SVLTE devices have to maintain two separate connections, and thus two separate powered radios. The Tri-band devices have a single radio for all mobile network pathways and thus can operate with less power, meaning lower power use and leading to longer battery life.
*
2. Voice usage is dramatically lower now than it was even a few years ago, this means the need for most consumers to have both voice and data simultaneously is less. In addition, with the increasing use of Video Calling (which go over data only) that also reduces standard voice call usage.
*
3. Many companies are going this route, thus meaning similar devices for multiple carriers, and thus reduced costs for phones due to the scale of production. Having a separately built device to be unique in this regard, means the phones cost more for Sprint to purchase, and thus cost more to the end-user as well. Just look at the new*CCA*stuff where the fact the same identical device can be used across all of these small carriers in turn mean lower costs to all of them. The Youtube*keynote*is more informative and has Masayoshi Son, but he is a bit difficult to understand at some points (not used to Japanese accent personally). Production scale has a lot to do with it though.
*
4. CDMA customers aren't used to SVLTE in general, and the average person probably doesn't know their phone is even capable of it in some circumstances on various carriers.
*
5. SVLTE (Like SVDO on a couple devices) was never a designed feature of these phones, it was a side effect of the way the radios and transmit/receive pathways needed to be designed for the Sprint models of the phones. It was never an advertised ability.
This was copy paste from s4gru
But it's very true
Sent from my SM-G900P using Xparent BlueTapatalk 2
So I moved to a new house which has basically no LTE and lower cellular coverage. My old house was a highrise with a literal t-mobile tower on the top, so I never even considered using wifi calling as my LTE coverage was perfect.
So here I am, with my Note 5, thinking I can rely on wifi calling in my new house. The house has excellent wifi coverage that can still achieve decent speeds even on the exterior. I use an Asus AC router that I've completely opened up to the world while troubleshooting the problem. Sitting in my living room (where my most recent call was dropped), I'm pulling down 74mbps and uploading 13mbps according to the speedtest app on the note 5.
My phone shows that it's connected to wifi and that Wifi calling is enabled. I've also changed it to "Wifi calling preferred" so it doesn't even attempt to use the limited cellular network that I can get in some rooms occasionally (depending on air density).
However, I basically miss all inbound calls, outbound calls only occasionally connect, and when I do have a successful call, it drops in and out as though I'm on an actual spotty cellular network.
I've tried Arter, SkyHigh and stock rooted kernels, all with the same results. I'm basically at my wit's end and getting ready to abandoned t-mobile. I read that exynos does not handle these handoffs and transitions as well as qualcom SOCs, but I'm reluctant to give up my great note 5 for a ****ty LG just to test this theory.
Can anyone provide some guidance or advice on how I can deal with this? I'm on the original jump plan + unlimited data and I really don't want to abandon t-mobile, but working voice is essential.
apols said:
So I moved to a new house which has basically no LTE and lower cellular coverage. My old house was a highrise with a literal t-mobile tower on the top, so I never even considered using wifi calling as my LTE coverage was perfect.
So here I am, with my Note 5, thinking I can rely on wifi calling in my new house. The house has excellent wifi coverage that can still achieve decent speeds even on the exterior. I use an Asus AC router that I've completely opened up to the world while troubleshooting the problem. Sitting in my living room (where my most recent call was dropped), I'm pulling down 74mbps and uploading 13mbps according to the speedtest app on the note 5.
My phone shows that it's connected to wifi and that Wifi calling is enabled. I've also changed it to "Wifi calling preferred" so it doesn't even attempt to use the limited cellular network that I can get in some rooms occasionally (depending on air density).
However, I basically miss all inbound calls, outbound calls only occasionally connect, and when I do have a successful call, it drops in and out as though I'm on an actual spotty cellular network.
I've tried Arter, SkyHigh and stock rooted kernels, all with the same results. I'm basically at my wit's end and getting ready to abandoned t-mobile. I read that exynos does not handle these handoffs and transitions as well as qualcom SOCs, but I'm reluctant to give up my great note 5 for a ****ty LG just to test this theory.
Can anyone provide some guidance or advice on how I can deal with this? I'm on the original jump plan + unlimited data and I really don't want to abandon t-mobile, but working voice is essential.
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Not sure of a solution but I can tell you that I use Wifi calling all the time on the Note 5 and do not experience any of these issues.
We would need to know more details to help further.
Are you stock? If not, which rom?
When was the last time you wiped your phone?
Anyone else have Tmob in the home?
I understand your frustration but I dont think its Tmobile. Chances are its something with your internet connection or a software issue of the phone.
DeeXii said:
Not sure of a solution but I can tell you that I use Wifi calling all the time on the Note 5 and do not experience any of these issues.
We would need to know more details to help further.
Are you stock? If not, which rom?
When was the last time you wiped your phone?
Anyone else have Tmob in the home?
I understand your frustration but I dont think its Tmobile. Chances are its something with your internet connection or a software issue of the phone.
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Click to collapse
Thanks for the reply! Not stock, using Darthstalker V11 rom. Only person living here, but I do have a verizon iphone for work. I just moved here, and prior to moving, I had an enterprise level firewall in place, which meant I had to open up the right ports to allow for wifi calling. Since I've moved, I haven't even put it in place, so I'm just using an Asus router as a router & AP with no firewall functionality.
Phone was last wiped a couple of months ago when installing the latest version of Darthstalker. With each kernel I've tried, I've wiped the cache multiple times post-install.
apols said:
Thanks for the reply! Not stock, using Darthstalker V11 rom. Only person living here, but I do have a verizon iphone for work. I just moved here, and prior to moving, I had an enterprise level firewall in place, which meant I had to open up the right ports to allow for wifi calling. Since I've moved, I haven't even put it in place, so I'm just using an Asus router as a router & AP with no firewall functionality.
Phone was last wiped a couple of months ago when installing the latest version of Darthstalker. With each kernel I've tried, I've wiped the cache multiple times post-install.
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Was the Wifi calling working before you moved?
DeeXii said:
Was the Wifi calling working before you moved?
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I never had to actually rely on it, so I'm not sure. I used it here and there when visiting low-coverage areas, but now it's basically my only option. For reference, I moved from the DC area to a smaller town in Central VA that only recently received t-mobile LTE. That being said... in certain areas of my house I get enough t-mobile LTE to pull down 30Mbps, but the upload portion is incredibly asymmetric and only pushes about .1 mbps up... Given that I get decent LTE in some places in the house, but it drops off as soon as I turn the corner, I've configured wifi calling to prefer wifi over cellular, which leads to another odd thing....the phone basically needs to be rebooted once leaving a wifi calling network, as it'll never switch the LTE radio back unless I reboot. It'll just stay on 3g/edge otherwise.
As for my wifi coverage, I get great speeds when testing basically anywhere in the house, both upload and download. However, when I'm on a call that is clearly being routed through wifi, it'll start pinging me and warning that the call may be dropped in place where I'm still getting excellent wifi coverage.