[i9001][GPS][GLONASS] Posibility - Galaxy S I9000 Q&A, Help & Troubleshooting

Hi,
I wonder if it's possible to reprogram i9001 gps module in this way to make glonass network connections possible. SGS III can connect to glonass network and I've read that glonass connection is a software problem. So maybe is's possible to reprogram i9001 module using SGS III software.
THX

I don't think it is possible.
EDIT:It is possible,we must wait for a ROM with glonass support and then we can take filse needed.
I9001 has glonass support,because it has a qualcomm chip inside.It is sad that no rom has glonass support.

Didn't even knew about this network, but i'm really interested right now.
What do you think of this?
http://forum.xda-developers.com/showthread.php?t=1436776
Looking at the table on this link shows that our chipset is capable of running with glonass.
http://ru.wikipedia.org/wiki/Snapdragon
(ours is MSM8255Turbo)

I also think it's possible but we need a developer to help us.

I don't think it's possible because it's probably low-level stuff in baseband firmware. That area is completely proprietary. Same reason why there's no monitor mode for wifi.

DualJoe said:
I don't think it's possible because it's probably low-level stuff in baseband firmware. That area is completely proprietary. Same reason why there's no monitor mode for wifi.
Click to expand...
Click to collapse
Is there any news on this GLONASS for i9001
So many other Samsung's models that has GLONASS support.

Related

What is the Galaxy S BT/GPS/FM chip?

Has anyone pulled the phone apart and read the serial number off the chip. We are trying to compair it to the US phone. If you have the info thanks Ours is a Broadcomm BCM4751 (Captivate)
Can I ask how you know the Captivate has a BCM4751 chip? Did you disassemble and see it? It appears that the Galaxy S generic being sold everywhere else outside the US has the BCM2075 chip that integrates BT and FM radios; at least that's what's being reported by others here.
If it were true that the Captivate/Fascinate/Vibrant in the US are using the BCM4751 chip, then it would truly mean these phones have no FM capability at all and there is no prospect of rooting the phone to disable a software level crippling.
This pisses me off. I was willing to forgo the front facing camera of the US versions, but the fact that they (apparently) went so far as to have samsung supply a different GPS chip to eliminate the FM radio so you are FORCED to use some ****e, data intensive service like AT&T radio instead is just outrageous. With the GPS/compass/antenna problems seemingly going ignored by samsung, maybe I won't get this phone at all.
http://www.broadcom.com/products/GPS/GPS-Silicon-Solutions/BCM2075
bugmenever said:
Can I ask how you know the Captivate has a BCM4751 chip? Did you disassemble and see it? It appears that the Galaxy S generic being sold everywhere else outside the US has the BCM2075 chip that integrates BT and FM radios; at least that's what's being reported by others here.
If it were true that the Captivate/Fascinate/Vibrant in the US are using the BCM4751 chip, then it would truly mean these phones have no FM capability at all and there is no prospect of rooting the phone to disable a software level crippling.
This pisses me off. I was willing to forgo the front facing camera of the US versions, but the fact that they (apparently) went so far as to have samsung supply a different GPS chip to eliminate the FM radio so you are FORCED to use some ****e, data intensive service like AT&T radio instead is just outrageous. With the GPS/compass/antenna problems seemingly going ignored by samsung, maybe I won't get this phone at all.
http://www.broadcom.com/products/GPS/GPS-Silicon-Solutions/BCM2075
Click to expand...
Click to collapse
Well the Galaxy S might have the BCM20751 but untill someone tears down the phone and checks with their eyes. The US Captivate was torn down and it is a 4751. But the 4751 doesn't have BT on it. So it could be all the phones have a 4751 with a seprate BT and FM. The 4751 is supposed to be a better GPS unit then the BCM20751 though.
ah, I see it on the Captivate general forum now. The only teardown of the generic Galaxy S that I have seen anywhere is the original one done in Korea a month ago. The pictures from that disassembly are too low-res for me to make out chip IDs. I tried going through their video of the teardown frame by frame too, but again, I can't see the numbers clearly and I saw nothing that resembled a broadcom chip. The Captivate board layout is much different than the Galaxy S, I can't really even see where the broadcom chip should be on it either.....
You're gonna love this. On my Galaxy S, According to jupiter.xml:
<gll
LogPriMask="LOG_DEBUG"
LogFacMask="LOG_GLLAPI | LOG_NMEA"
FrqPlan="FRQ_PLAN_26MHZ_2PPM_26MHZ_300PPB"
RfType="GL_RF_4751_DANUBE"
BrcmRFwildBase="0x1E2D6409"
BrcmRFclkDiv="21"
BrcmRFclkRefHz="26000000"
pps-enable="false" pps-offset-ms="0" pps-width-ns="100"
/>
Click to expand...
Click to collapse
I changed the RfType to GL_RF_2075_BRCM and it just didn't work.
Well thats good. We've accomplished something. But Broadcomm says this is the best GPS they have ever made some hopfully samsung messed up the code and we get a super good GPS.
TBH - I think we may actually be waiting on the driver from Broadcom. Something about Broadcoms reputation as an open source provider is in question.
sjdean said:
TBH - I think we may actually be waiting on the driver from Broadcom. Something about Broadcoms reputation as an open source provider is in question.
Click to expand...
Click to collapse
Yeah it could deff. be broardcoms side. They better fix it.
Is the 4751 used in any other phones just want to see the performance of the gps on this chipset in other devices..
The mere fact that we have Broadcom chip for GPS and not some off brand that I've never heard before like InCrystal really, really points to a serious issue with the drivers/firmware for the GPS. The phone should be operating in MS-Based mode out of the box anyway and I don't know why it isn't. That's not the only problem it has but standalone mode is not what it should be operating in. Nearly all phones GPS' are truly the pits without network assistance.
Lots of phones use Broadcom for GPS, right off of the top of my head, the iPhone is one of them!
Well I really hope it can operate in stand alone mode reasonably well, it should be able to, I dont see why a phone couldn't. agps is mainly just for helping get locks faster at startup and possibly in areas where gps signals are weak but agps is not going to help you out of the city much etc etc.
However yeah I really hope it is a driver issue and if so broadcom and samsung need to get together or its going to drag both their names down.
Kilack said:
Well I really hope it can operate in stand alone mode reasonably well, it should be able to, I dont see why a phone couldn't. agps is mainly just for helping get locks faster at startup and possibly in areas where gps signals are weak but agps is not going to help you out of the city much etc etc.
However yeah I really hope it is a driver issue and if so broadcom and samsung need to get together or its going to drag both their names down.
Click to expand...
Click to collapse
Well like I said there appears to be some other issues besides the fact that they ship in standalone mode which is awful for any phone.. aGPS is the first choice for most phones (Galaxy S is an exception I suppose!) before falling back to standalone mode which does take 2-3 minutes for a fix. Standalone GPS will always take a few minutes to get a lock, a phone certainly isn't going to perform better than a Garmin and I have yet to see one of those in standalone mode lock faster than a phone with aGPS. aGPS is for an initial fix regardless of other circumstances and it's why phones get such snappy fixes.
Ok, but I posted elsewhere that there's a whole stack of a lot happening behind the scenes, which Im not even Samsung know what's going on.
First, even in Standalone mode, you see data being streamed in the initial few seconds, so there must be something in there.
But Ok, we have:
Operation Mode under LBSTestMode - MS Based, MS Assisted, Network Provider or standalone
GPS Plus - Uses the OneXtra servers
Skyhook - Another form of AGPS
SUPL Settings
And irrespective of what you set the SUPL settings to:
Jupiter.xml - Points to both www.spirent-lcs.com as an acSuplServer then points to bcmls2.glpals.com as the LbsServer.
Then under Location and Security, we have the ability to Use Wireless Networks (using WiFi and Cellular Networks). Even if this is switched off, the phone still wants to enable Wireless and see what's out there.
So that's what, 6, perhaps 7 or even 8 seemingly different settings, different methods, of A-GPS.
No wonder the phone is getting confused.
Cya
Simon
sjdean said:
Ok, but I posted elsewhere that there's a whole stack of a lot happening behind the scenes, which Im not even Samsung know what's going on.
First, even in Standalone mode, you see data being streamed in the initial few seconds, so there must be something in there.
But Ok, we have:
Operation Mode under LBSTestMode - MS Based, MS Assisted, Network Provider or standalone
GPS Plus - Uses the OneXtra servers
Skyhook - Another form of AGPS
SUPL Settings
And irrespective of what you set the SUPL settings to:
Jupiter.xml - Points to both www.spirent-lcs.com as an acSuplServer then points to bcmls2.glpals.com as the LbsServer.
Then under Location and Security, we have the ability to Use Wireless Networks (using WiFi and Cellular Networks). Even if this is switched off, the phone still wants to enable Wireless and see what's out there.
So that's what, 6, perhaps 7 or even 8 seemingly different settings, different methods, of A-GPS.
No wonder the phone is getting confused.
Cya
Simon
Click to expand...
Click to collapse
Interesting, so standalone isn't really standalone at all
I wonder if any of the problems are actually being caused by agps especially as a lot of the "fixes" by users were basically changes to the agps.
Curious....., if you google skyhook and you see how samsung and I think even apple used skyhook etc and all the big fanfare etc over it but it seems to be disabled in this phone.
and some of the fixes were to use the google location server right?
(weren't google roasted around the world for wardriving and recording wifi sites and also the data? hehe), now i know why they did it.. for location services I guess... a bit off topic but just now seeing why there were even interested in wifi sites etc.
So.. this broadcom chip... its supposed to be good? can we eliminate the hardware as being a bad gps chipset?
Other things to keep in mind when determining the chip are BT and wifi. The 2075, for example, provides bt 2.1, which rules out its presence on the SGS, unless samsung decided to install multiple bluetooth chips. So, the chip we are looking for provides either bt, version 3.0 and wifi N and GPS, or one or 2 of those 3, which makes the 4751 way more likely indeed. I also don't see a reason to change the internals of the phone.
Gps is a Qualcomm RTR6285 like desire, nexus, some blackberry.
careace.net/2010/06/09/disassembly-of-the-samsung-galaxy-s/
news.danawa.com/News_List_View.php?nModeC=4&nSeq=1742568
sesamee said:
Gps is a Qualcomm RTR6285 like desire, nexus, some blackberry.
careace.net/2010/06/09/disassembly-of-the-samsung-galaxy-s/
news.danawa.com/News_List_View.php?nModeC=4&nSeq=1742568
Click to expand...
Click to collapse
This:
news.danawa.com/News_List_View.php?nModeC=4&nSeq=1742568
must be the korean version (hardware is diferent)
for example :
http://www.careace.net/wp-content/uploads/2010/06/galaxy-s-disassembly-29.jpg
http://www.danawa.com/cms/popup_image.php?url=http://img.danawa.com/cms/img/2010/07/06/14.jpg
Audio codec is the same (wolfson)
Configuration files show tha GPS chip is bcm4751 in european galaxy s (not GPS BT FM BCM20751 or BCM2075) in captive there are photos also.
it REALLY seems like a driver issue. I can get a lock within seconds in MS based mode like all other Android phones with 6 meter accuracy tracking in my car but the performance diminishes after that and the phone requires a reboot for another fix -- IF GPS doesnt cause a lock up trying to get a lock.
Anyone else notice the same behavior in MS based mode?
Sent from my SGH-T959
as i have said in the gps issue thread my settings are as they were from the factory, and at least for now my gps works, in test mode it sees 9-11 satalites, and locks 5-7 of then in about 9 secs, it even suprised me today when i was stood on my staires surrounded by brick walls it managed to get a fix.
this was however not the case with the first one i had, no matter what i tried i could not get a reasonable fix, so it seems to me like some phones are better then others, even thought they are the same phones, this is why i suggested it could be a faulty batch but that is not the case, so i have no idea why this one works and the other never.
if you want the settings: gps is set to oo
application setting
session type: tracking
test mode: s/w test
opperation mode: standalone
start mode: hot start
gps plus: on
dynamic accuracy: on
accuracy: 50
skyhook: off
use pc tool: off
supl/cp setting
sever fqdn: custom
server: www.sprint-lcs.com
server port: 7275
supl secure socket: on
agps mode: supl
hope these can be of use for someone, please note im in the uk.
edit: just tested out my window and got 8 found / 8 locked satalites in 12 secs
Things are getting even more weird...
I was browsing around in the jupiter.xml file shipped in the JP2 firmware and found what I suspect must be a a typo:
arp-supl-reaiding-time-sec = "1200"
Shouldn't that be: arp-supl-reading-time-sec = "1200" ?
With all that mucking about with wads of configuration files and a bazillion places where (conflicting) settings can be made, this doesn't exactly make me feel better about the reliability of AGPS on this device.
edit: nah, probably not a typo (read as 're-aiding', duh) but an unfortunate name choice anyway. At least it appears consistent with what the app is expecting.

[Q] Sprint Tab; want Gingerbread; don't care about phone service

I have a Sprint tab. I wan't to upgrade to gingerbread, and I don't care about CDMA service, but I have to have wifi. GPS would be preferred but I can live without it. It would also be nice if it wasn't a brick afterwards.
What are my options? Can I just flash Overcome without a modem file? Is there some sort of null modem file I can flash? Is there a different ROM or kernel I should use?
http://forum.xda-developers.com/showthread.php?t=1020167
jiminitaur said:
I have a Sprint tab. I wan't to upgrade to gingerbread, and I don't care about CDMA service, but I have to have wifi. GPS would be preferred but I can live without it. It would also be nice if it wasn't a brick afterwards.
What are my options? Can I just flash Overcome without a modem file? Is there some sort of null modem file I can flash? Is there a different ROM or kernel I should use?
Click to expand...
Click to collapse
Also very interested in this.
I recently put quite a bit of effort into getting GB to run on my Sprint tab. I use WIFI only so I was not concerned with a working CDMA radio. I attempted to flash the European GSM firmware to my device. I tried flashing the kernel and system only, leaving the CDMA radio file intact. I also tried flashing several GSM radio files to the device. In the end I was unsuccessful, and it took several hours to recover the device to an operational state.
If you WERE to get GSM GB working, there is a good chance that GPS and BT wouldn't function. That's kind of a deal breaker for me.
tldr; Sprint users are screwed until the official release of GB because the Overcome team doesn't care about us and the only guy who seems to know how to work the CDMA is making a crappy honeycomb build instead.
IMHO other devs should make a version of the ROM with all data taken out because it'll work for Sprint users and GSM users who tether instead of paying out the rear for a data plan on their tab.
----------------------------
tonman23: Thanks, but i was looking for gingerbread, not honeycomb. It's great that spacemoose can prove it in concept, but I don't like the honeycomb interface, and I'm not interested in flashing a half broken version of it to my phone. I want a stable gingerbread build for the improved performance and minor UI features.
etvaugha: BT & GPS are handled by chips completely independent of the modem. I can't post a link because I'm still new here but the ifixit galaxy tab teardown shows clearly that GSM tabs have distinct BT/WLAN & GPS chips. That's pretty standard fair for android devices, so I doubt they changed it simply for the CDMA models.
It also clearly shows that the modem is a GSM only chip, so the bin files are completely incompatible. The only solution is ROMs that will boot even if the modem isn't working right.
----------------------------
According the the Overcome 2.0 FAQ, the problem is that the phone won't finish booting if a valid modem.bin is not installed. Apparently the phone waits indefinitely (one user, PFOI, mentioned something about it working after 30 min or so) or crashes during the boot because it doesn't get a proper response from the modem chip.
This could easily be overcome if the devs would compile a WIFI only version of the rom/kernel, that doesn't require or support either modem (CDMA nor GSM). It seems to me that the this would be good for both sides, as the data plans for tabs are a rip off and smart users are going to tether their tabs in a mobile situation anyway. It would also probably be better for battery life considering there'd be one less chip running and less bus activity.
I'd imagine all that would be required is removing the modem initialization during the boot sequence. There might be a need to replace the functions that query the modem's status with static value return statements, but when the tab first boots it reports no service, so it's got an inherent ability to deal with not having network access. All that's needed is a couple little snippets to tell the device it doesn't, and to keep it from trying to get it.

Glonass

Hello everybody !
I saw that some phones (iPhone 4, Galaxy note, Samsung omnia7) had a GPS chip which also allows to use Glonass (Russian GPS). I've also seen (while searching for information about this glonass) that having 2 times more geo-localisation satellites would make the GPS lock 3 times faster.
So is it possible to enable glonass support in our phone ?
Thank you for your answers !
which phone model are you referring to?
glonass support starts from the chip itself. so if you unit's support is only GPS, then you can't enable glonass.

[Q] GPS (device only) requires a signal lock from stock for many ROMS

Hello,
I was reading about the problem of GPS in many ROMS, and I found that in many threads about custom ROM for Moto G 2014 there is written that GPS (device only) requires a signal lock from stock to function correctly or we have to make this workaround.
I' m curious and I'd like to understand what that means? "GPS (device only) requires a signal lock from stock to function correctly". What is a "signal from stock" and in wich way can I obtain this signal?
Thanks! and sorry is the question si stupid
jackcicci said:
I' m curious and I'd like to understand what that means? "GPS (device only) requires a signal lock from stock to function correctly". What is a "signal from stock" and in wich way can I obtain this signal?
Thanks! and sorry is the question si stupid
Click to expand...
Click to collapse
While still on stock ROM, make sure that your device has locked on to some GPS satellites (check with GPS Status & Toolbox. The app will show the satellites in green if locked on).
Now you can flash your custom ROM.
If you already flashed a custom ROM you can execute these two fastboot commands:
fastboot erase modemst1
fastboot erase modemst2
Thank you for the reply. Do I need a pure stock rom or it works also with custom roms based on stock?
And what can be the reason because is needed to lock with the satellites? How can a previous rom have influence in the roms that I will install later?
jackcicci said:
...
it works also with custom roms based on stock?
...
How can a previous rom have influence in the roms that I will install later?
Click to expand...
Click to collapse
Should work with TitanPrime too.
Why that happens? I can only speculate. There are special partitions that apparently get treated differently by stock and custom.
That's why the fastboot command always works.
doppelhelix said:
Should work with TitanPrime too.
Why that happens? I can only speculate. There are special partitions that apparently get treated differently by stock and custom.
That's why the fastboot command always works.
Click to expand...
Click to collapse
Thank you. I've the impression that this happens more frequently with cyanogen based roms, do you think this is possible? And it can be due to some particular feature of the cyanogen mods?
But maybe I'm wrong, I'm still new to Android Sorry for bothering you...
MOTO G 2014 GPS vs AGPS use
Not sure if this is the right place to post this. I am considering buying the Moto G (2014) but want to make sure I can use it for offline GPS tracking when in remote areas. The Motorola site for the phone specs only indicates it having AGPS which I understand requires either a cell site connection to speed up and make a satellite connect more accurate. But I thought AGPS only works if you have a discrete GPS receiver in the phone which would mean all phones which list AGPS must have a GPS receiver first. If that is true I could use it in remote areas. But when I called the Motorola help site and asked about it on that phone, they said it required to have a cell connection for it to work. Not sure if they really knew what I was asking. Does anyone know if that is true - have you used it off line and if so how does it work (assuming you have preloaded maps)? Also I had heard that AGPS does not require data use (or a data plan) which I do not plan on using. Is that true also?
Thank you for any help, Tomas
Maybe they are speaking about using Google maps that requires Internet. But if You use apps like here maps or Tom Tom you dont need the internet. I used a WiFi only Nexus as navigator with gps device only.
jackcicci said:
Maybe they are speaking about using Google maps that requires Internet. But if You use apps like here maps or Tom Tom you dont need the internet. I used a WiFi only Nexus as navigator with gps device only.
Click to expand...
Click to collapse
Jackcicci, Thanks for the response. I really think that Motorola person didn't really know the correct answer and asked her supervisor for a clarification. But since their site only says AGPS they both thought that it needed a Cell connection for it to work at all, not just to improve it. But if you only used Wifi and no Cell connection and it worked, I think it means the phone does have a GPS receiver built in and your Wifi probably just downloaded the needed map corrections? But as a full test, have you ever done it without either wifi and cell connections with a loaded map of your area to see if that works? That's what I would need for remote use like backpacking for instance. Also how good is the GPS in terms of speed and accuracy? That would be helpful on poorly defined trails.
I've used Navigon and Google Maps offline after downloading the maps via wifi.
Yes I've just tried this morning with gps device only and without internet data and WiFi, here maps is working fine. All the maps were been downloaded before
Stand alone GPS or AGPS needed
Tell864 & jakcici,
Thanks for your test and feedback that the GPS would work offline. I thought it would, just confusing that Motorola staff would tell me otherwise, but not surprising since they probably don't get those questions much. So another clarification - was that on the 2014 2nd gen version? Also for the group in general - how well does the GPS do (without AGPS on) in speed of location lock-in and accuracy? As I mentioned it would be valuable for me in remote trail locating work and geo-caching to have one that works well, as I have seen reports that some phones are only good to about 200 meters at best.
Tomas
Tom Stachon said:
...
The Motorola site for the phone specs only indicates it having AGPS which I understand requires either a cell site connection to speed up and make a satellite connect more accurate. But I thought AGPS only works if you have a discrete GPS receiver in the phone which would mean all phones which list AGPS must have a GPS receiver first.
...
Also I had heard that AGPS does not require data use (or a data plan) which I do not plan on using. Is that true also?
Thank you for any help, Tomas
Click to expand...
Click to collapse
Almost all GPS capable phones are utilizing AGPS (never heard of one that doesn't. To mention it as a feature is just the usual marketing-bs). It will speed up the time-to-fix by utilizing the mobile network.
GPS will work without it, but the hardware is significantly weaker on phones than a dedicated GPS receiver, therefore the phone uses AGPS to improve performance. GPS will of course work without it. AGPS won't work without internet connection.
https://en.wikipedia.org/wiki/Assisted_GPS
Tom Stachon said:
Tell864 & jakcici,
So another clarification - was that on the 2014 2nd gen version? Also for the group in general - how well does the GPS do (without AGPS on) in speed of location lock-in and accuracy? As I mentioned it would be valuable for me in remote trail locating work and geo-caching to have one that works well, as I have seen reports that some phones are only good to about 200 meters at best.
Tomas
Click to expand...
Click to collapse
Hi I use device GPS all the time with Mapfactor Navigator and Orux maps (both offline maps) (XT1068 Moto G 2nd Gen Dual sim). I never have wifi or mobile data enabled and it works fine. I always get a fix within a few seconds no problem, even indoors. Accuracy is less than 5 Meters (15 ft), using GPS test at the moment in Germany, it's raining heavily outside accuracy shows as 13 ft 22 sats in view, 10 in use with a 3D fix, first fix time 2secs.
Hope this helps I use Orux maps with the screen off to record tracks and data when walking.
Have fun with your Moto G 2nd gen I do.
doppelhelix said:
While still on stock ROM, make sure that your device has locked on to some GPS satellites (check with GPS Status & Toolbox. The app will show the satellites in green if locked on).
Now you can flash your custom ROM.
If you already flashed a custom ROM you can execute these two fastboot commands:
fastboot erase modemst1
fastboot erase modemst2
Click to expand...
Click to collapse
This was REALLY helpful! Was banging my head against the wall because I couldn't figure this out! Thanks!
Hello,
Can I use this command for Samsung S4, i9505? Thanks

GNSS: Gaiileo?, dual frequency?

There is almost no information on GNSS. It probably has Galileo given that the previous generation of Huawei phones did - but some preview sites say yes others no.
The Broadcomm BCM4775x dual frequency (L1 L5) chips were predicted to lead to smartphones with < 1m GNSS accuracy this year. So far there are only two devices that have been seen in the wild and the only phone is the Exynos (EU and parts of Asia) version of the Samsung S9 Plus. Samsung has not announced or documented it or provided any interface in their software and in the relevant xda thread, the owners have not yet been able to confirm that the L5 signal is accessible .
The previous generation of Huawei phones used the Broadcomm GNSS chip prior to the BCM4775x series. We probably won't know what the p20 pro is using until there is a teardown.
If the leakers are to be believed the only two brands that will not use Snapdragon/ Qualcomm SOCs in their flagship phones this year are Huawei and Samsung. As Broadcomm and Qualcom are archrivals/ probably incompatible, Huawei would seem to be the best hope for dual frequency cm accuracy in a phone this year.
Anyone know any more?
It' a shame for a new SOC but no galileo on Kirin 970
http://translate.google.com/transla...é-galileotap-to-wakedolphin-résolu/&sandbox=1
https://www.usegalileo.eu//FR/inner.html#data=smartphone
Even if the p20 pro is not Galileo enable, the most important is it dual frequency capable? Coz gps, glonass and beidou are not few also
mkstowegnv said:
Anyone know any more?
Click to expand...
Click to collapse
The binaries on the P20 vendor partition are for BCM4774 as on older phones.
It supports Galileo (you must download LTO from the internet), but is L1-only.
cr2 said:
The binaries on the P20 vendor partition are for BCM4774 as on older phones.
It supports Galileo (you must download LTO from the internet), but is L1-only.
Click to expand...
Click to collapse
Thanks! When I tried to download the leaked firmware for the p 20, it was 8 Gb unpacked and I had to give up looking inside. Just for the record, if you did the work of finding BCM4774 evidence in the partition (thank you) would you be so kind as to give us a little more detail - even some code snippets if possible (like the xda ers who found and posted firmware evidence for the BCM4775x in the Samsung s9+ - Exynos version).
As you imply and as I understand it, the BCM4774 supports Galileo. But when various people have run GPStest and similar software on various phones, my (limited) understanding is that the phones were getting fixes without an internet connection. I am confused and less informed that I need to be, but do you think that P20 users would need an internet connection to get a Galileo fix? (or are you just saying that it would be a better fix?).
When you say "you must download LTO from the internet" I assume you are referring to the LTO in the following quote from https://www.broadcom.com/products/wireless/gnss-gps-socs :
"In addition to the GNSS receiver chips, Broadcom provides Assisted-GNSS (A-GNSS) and Long Term Orbits (LTO) services. These services are provided from highly reliable cloud-based servers that are fed from a proprietary World-Wide Reference Network (WWRN) stations that collect world-wide GNSS satellite data."
cr2 said:
The binaries on the P20 vendor partition are for BCM4774 as on older phones.
It supports Galileo (you must download LTO from the internet), but is L1-only.
Click to expand...
Click to collapse
Ifixit now has a teardown which confirms the presence of the BCM4774. I put the comment below in Step 10:
Not highlighted is the GNSS Location Hub BCM4774IUB2G above and to the left of the BCM43596 (green). This means that provided the software/ firmware is amenable, this phone should make use of signals from the Galileo satellites (https://www.broadcom.com/products/wirele... ). This is something that different websites and Huawei itself have been inconsistent in reporting.
I tried GPS Satellites Viewer yesterday evening, and it showed me 3 Galileo Satellites without the download of anything. I tried it in the morning again and now I do not find any Galileo satellites... its strange.
Zingel1986 said:
I tried GPS Satellites Viewer yesterday evening, and it showed me 3 Galileo Satellites without the download of anything. I tried it in the morning again and now I do not find any Galileo satellites... its strange.
Click to expand...
Click to collapse
Many apps do not show Gallileo. GPSTest by barbeauDev works.
But it takes a little bit longer until the Gallileo satellites appear in the list.

Categories

Resources