pay for GPS? - XPERIA X1 General

I'm wondering do you have to pay any fee when using GPS in my X1? I had successfully managed to install iGo 8 in my X1.
Thanks,

No you dont have to pay any fee

Receiving GPS signals itself is free.
The program you use to read the signals and provide navigation might not be.
GPSTest for instance tells you where you are (longitude and latitude). Not very useful in itself. Google Maps is free, and puts a GTA2 like map with a Dot on it where you are.
TomTom puts a GTA3 like map with direction based navigation (but isn't free).
Some not free applications:
- TomTom (once off charge for maps)
- Wayfinder (one charge for limited period of use i.e. 3 years)
etc.
Hope that helps!
Edit:
By the way, consumer GPS devices are [hard] coded to recieve updates only 1 or 2 times per second, hence they are inaccurate to about 10-15 meters. Rumour is that US military recievers are coded to recieve several (10+) updates per second, and therefore are far more accurate (you wouldn't want to bomb the school next door with a missile fired from 100km away now would ya )

only have to pay for GPRS, not GPS

GPS itself is free . .
but sometimu'l b charger for updatingMAPS , not for usingnavigation

Related

Question regarding GPS on Wing

So I was wondering... What is the most cost effective way for me to go about getting a gps program for my wing? I know that i used to have a blackberry with nextel and I paid a couple bucks a month for the gps service. Is there any way for me to get this service for free? I have seen apps like TomTom but, they are rather pricey....i'm trying to find the most economical way to go about doing this..
Thanks all!
There are several possibilities but none of them is for free unfortunately (since were all not such big fans of warez).
Ofcourse there's Tomtom and Route 66; this will run you up to about 100 EURO's for the software and the needed maps. Depending on your country this price might include the gps mouse needed.
Besides this there are several companies, for instance Wayfinder, which supply request based gps maps; the maps can be used by downloading the needed route bij gprs. Usually these companies can charge you up to 10 EURO's a month excl. data fee's.
These map can be used with or without GPS connection.
My preference lies with Tomtom (afterall it's a dutch company) because the supreme usability, good maps and possibilities. If you use Tomtom frequently it will be cheaper then the other options. So ther's your answer
What kind of hardware is needed to achieve GPS access on the wing?
I use a Holux GPS Slim 236 (bluetooth) with iGuidance (USA) software and it works pretty well. Got the GPS about a year ago on ebay for around $60. iGuidance got as a gift, so don't know how much that costs. But the GPS also works with google maps, MS Live, Yahoo Go...those are free and will show you the GPS route and your location on the map. Just doesn't give you voice directions and of course you'll need internet access.

GPS Cost

For AT&T does using GPS cost money? From my understanding it only uses data to download maps but retrieving my coordinates is free. Do I understand correctly or have I been misled? (I do not remember where I read that.)
Also if it is true, then is there any GPS program that I can use that I can just download a map of a single city to my phone. That way I can just use Wifi at home to retrieve the map, then I can use it in my city for free.
Thirdly, assuming it true. Apps that tell me how fast I am going and how far I have traveled, would they cost me money. I think not because all they use is my coordinates, right?
GPS is free of charge, because it uses a satellite and no internet service.
There are a bunch of navigation softwares out there, but as far as I know, they all cost money. I, for example, use TomTom Navigator in Germany. You can buy it for around $100 with a detailed map of Germany and major roads of western europe. You can also purchase extra maps, for other countries. Dont know if you can buy a single city or state with at TomTom USA.
TomTom tells you how fast you are going at the moment you are using it. But there are a range of Tracking Apps, that can monitor the distance you do (Like TrackME). There is one program (forgot the name), that tracks your location like every 5 minutes and safes the coordinates in a format "Google Earth" is capable to read. So you can import the date and import it into Google Earth and then see the route you took.
If you have GPS in your phone, coordinates comes from satellites and is free. This is the signal that most of the non-map GPS apps use, so indeed free.
However, Assisted-GPS, which helps your GPS finding a signal faster, downloads a few kilobytes from the network, so costs very little, but is not free.
Maps are different. If you want it for active routing, you either need to buy and preload (TomTom, Garmin, and the likes), or you need an online service (Google) and you will need to pay data traffic for that
If you want the maps just for reference, not for active routing, and preload them at home, than there are a few nice programs, this one is very nice for the non-demanding user
Why does the edge symbol say its connected?
Don-Carlo said:
GPS is free of charge, because it uses a satellite and no internet service.
There are a bunch of navigation softwares out there, but as far as I know, they all cost money. I, for example, use TomTom Navigator in Germany. You can buy it for around $100 with a detailed map of Germany and major roads of western europe. You can also purchase extra maps, for other countries. Dont know if you can buy a single city or state with at TomTom USA.
TomTom tells you how fast you are going at the moment you are using it. But there are a range of Tracking Apps, that can monitor the distance you do (Like TrackME). There is one program (forgot the name), that tracks your location like every 5 minutes and safes the coordinates in a format "Google Earth" is capable to read. So you can import the date and import it into Google Earth and then see the route you took.
Click to expand...
Click to collapse
The E will pop up while the phone asks the network for the co-ordinates of the local masts your are connected to. This can happen not just to get the original lock and your postition but if you are indoors it will stay on untill it picks up enough sats to navigate on its own.
Can I tell it to use Wifi for that instead of the Edge network? Will it only need to use this once?
anarchyuk said:
The E will pop up while the phone asks the network for the co-ordinates of the local masts your are connected to. This can happen not just to get the original lock and your postition but if you are indoors it will stay on untill it picks up enough sats to navigate on its own.
Click to expand...
Click to collapse
If you are that worried about data connections, just disable AGPS. You can do that with Advanced Config tools 3.3. And/Or disable the data connections themselves, so *no* program can use data, also possible with Adv Cfg 3.3, but easier with Modaco NoData. Search the board for these utilities.
After disabling AGPS, you can still use QuickGPS when connected to WiFi to pre-download satellite positions, otherwise getting a fix takes several minutes. Search the forum for more info, all of your questions have been asked and answered before.
Thank you very much. I did search, however I must not have used the right keywords as I could only find programs that used GPS.
cybermaus said:
If you are that worried about data connections, just disable AGPS. You can do that with Advanced Config tools 3.3. And/Or disable the data connections themselves, so *no* program can use data, also possible with Adv Cfg 3.3, but easier with Modaco NoData. Search the board for these utilities.
After disabling AGPS, you can still use QuickGPS when connected to WiFi to pre-download satellite positions, otherwise getting a fix takes several minutes. Search the forum for more info, all of your questions have been asked and answered before.
Click to expand...
Click to collapse

Can I track a GPS chip with my DI?

Yesterday, our dog ran off in the woods. She was OK, but she got too far then couldn't find us, and the puppy kicked in and she started running..
They have GPS dog collars, but they either require a (fairly large) monthly fee, or, like the Garmin ones, are $600+. I only want one to snap on her collar when we go in the woods, so that if she does run off again or ever get hurt, I can find her.
BUT: I want to track it on my phone (since it's with me all the time and I get service everywhere). Is there such a device?
I would be interested in this, too.
Me too, but for my girlfriend ;-)
She calls me serveral times per week lost so I bought her a Garmin for Xmas but she is techno-challenged. Ok she is not the sharpest tool in the shed but she is the sweetest ;-)
No such thing as a terrestrial GPS transmitter for public use.
Our phones, Garmin and TomTom, et al, devices, are GPS receivers.
The geosynchronous GPS satellites are the transmitters.
The mobile units, such as Garmins and our phones, listen for data streams from multiple satellites (that is why the more satellites "seen", the more accurate your location) and cell towers (in the case of smarphones). All these transmitters, which are pre-programmed with their location information, are saying "this is me and this is where I am". The reciever takes this information and calculates the mobile unit's location relative to the transmitters. Since the transmitters are telling the world where they are and the receiver has figured out where it is relative to them it can conclude "this is where I am".
The reason the "trackers" require a subscription is that, once the mobile unit figures out its location based upon its calculations from the satellite data streams, it sends its location to the service which makes it available to the subscriber.
I don't know what dedicated doggy trackers cost, but several cellphones are available from providers with a service like this. ATT has FamilyMap
https://familymap.wireless.att.com/finder-att-family/howWorks.htm
Verizon has Family Locator
http://support.vzw.com/clc/features/data_services/family_locator.html
and you have your imagination.

GPS.....A-GPS SCAM?? The gps drama sequel....

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"EDIT" UPDATE (7 oct. 2010)
Well you dont need to go actually much further then this first post!
Things got out of context over here, furthermore I decided to give
my external gps receiver a break and run some more tests with
the internal one of my SGS.
And the results I got were much better than any
other phone I tested before. Except the ones with a build-in SirfstarIII chipset.
If you have Gps issues,Just move on to this thread:
2nd edit (20 Oct, 2010): That thread was removed without any warning or explanation so I posted the videos in another thread:
http://forum.xda-developers.com/showthread.php?p=8903056#post8903056
END EDIT
RCinFLA said:
Like to share my experience as cellphone chipset designer and my dealing with various parties involved with GPS in phones.
Many of the issues are caused by business interests involved and there are quite a few parties plying to control location based services revenue stream.
SUPL, secure user plane protocol AGPS was created by network operators interest in mine, with the objective of putting them in the controlling position when it comes to extracting revenue from location based applications on their network.
Control plane AGPS is a general system where network operator independent entities can create a assist server along with possible services offering. They can encrypt their access to allow only subcribed (paying) users to access their service. The network operators has little control over this scheme.
With SUPL, in most cases, network operators outsource the location server function. Network operator hold location of their cell tower, as a total database, in close confidence. The network tower locations are also very dynamic over time. I believe the AGPS contractors don't get reliable and timely updates from the network operators.
Then there are third party business like 'Skyhook' which is trying to work around the network operator roadblocks by establishing a 'ponzi scheme' server database. If your phone has a good GPS location lock and detects a WiFi network, Skyhook's background app will have your phone send a message to their server reporting the SSID of the WiFi and its location. They then sell their server AGPS service to other companies, like Motorola, for inclusion in their phone software. Motorola may run into conflict with network operators. A network operator might refuse to buy a Motorola phone model with Skyhook installed on it. I noticed from the Captivate forum that the ATT version of Galaxy S has Skyhook capability.
Google is the 900 pound gorilla and is trying to wrestle control of location based services from network operators.
Finally there are the GPS chip manufacturers. Almost all of them have an AGPS server scheme of their own and try to promote it. The frontend processing (up to recovery of raw 50 bps satellite data) has unique hardware and firmware that are considered proprietary by the GPS chip manufacturer. In most cases a phone manufacturers like Samsung or Motorola are not allowed to have the software source code for this firmware or information on the actual interface protocol to the GPS chip. They are given a bundled binary file that the phone manufacturer software just dumps to the GPS chip at startup.
It is now up to the phone manufacturer to implement the GPS chip and antenna systems (along with WiFI, Bluetooth, Near Field Comm, and multi-band cellular) and provide software interfaces and drivers necessary to run the GPS function.
For size and cost reasons most recent GPS chips rely on the main application processor within the phone to actually do the GPS fix calculations. The software for this is provided by the GPS chip supplier but it must be coordinated with the particular applications processor chip used by the phone. It must share processing time slicing with the apps processor and work with operating system software resources such as RAM and ROM management running on the phone.
This is the first obsticle as most of the GPS chip suppliers have little expertise in the OS's that may be used (like Android or Symbian). The phone manufacturer usually has to provide help to create and debug the GPS driver software but the drivers are responsible/owned by the GPS chip supplier. There can be unique hardware/software interfaces that must be dealt with, like providing GPS TCXO calibration and cellular corrected frequency timebase to the GPS chip.
Then there is the OS's GPS interface. There can be translation software layers involved here. One such interface is based on GPS NMEA protocol but with additional hooks for things unique to phone operation like battery saver power strobing, and the complicated Secure User Plane or Control plane interface.
The AGPS system design landscape is litered with intellectual properties (patents) by many parties. Qualcomm is a dominate player here since their aquistion of SnapTrak company years ago. Royalties are paid to Qualcomm for every WCDMA phone sold, not only in AGPS area, but on basic CDMA patents used in a UMTS (Wideband CDMA) phones.
Now as to Samsung Galaxy S implementation of Broadcom GPS.
I think there is a lot of evidence that Samsung had early issues with the GPS antenna contact hardware. This has probably been corrected on recently manufactured phones.
I think the firmware supplied by Broadcom has the bandwidth of the correlators tighted down to provide greater sensitivity. This is great as long as there is a very good AGPS system to provide initial satellite ephemeris data. Without a good AGPS network providing satellite information the initial search and lock can take a very long time with narrow bandwidth frequency bins.
I have not seen evidence with my experience that my two Vibrants are receiving any reliable AGPS information from the T-Mobile network. They do seem to get rough Almanac satellite info from Google or other third party apps. These may be based on WiFi detection more then T-Mobile cell tower locations.
In LBStest I noticed that GPS Operational Mode has been set to 'Standalone'. I interpret this to mean AGPS is deactived. I don't see any difference when I switch to MS based assist, and clear the GPS saved memory to prevent it from prejudicing time to first fix lock test. Switching SUPL server to supl.google.com and port 7276 (with MS based operational setting) just seems to make my phone lockup for short periods of time.
Once phone does get full lock on satellites its performance is quite good. (my two Vibrant's were purchased in early Feb 2011). It rivals my Garmin SiRFstar III based GPS unit in locked on sensitivity while inside a building.
I think the AGPS system issues will get worked out over time.
The Qualcomm based CDMA2000 systems (like Verizon) will likely have better initial coordination on AGPS system operation. CDMA2000 also provides network timebase directly compatible with GPS.
Click to expand...
Click to collapse
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All this nagging about GPS.....that it is not working in many devices and it's working in other many.....and of course I am talking about those ones who still would go for ONLINE gps navigation.....
In my humble opinion, what you guys should be asking yourselfs and the big corporations is, why nowadays, 99% of the smartphones(so not just sgs), even the most expensive ones are build with weak, less capable internal gps receivers, forcing users to go online(celular network /a-gps) or using external bluetooth gps receivers to get stable satellite fixes that means stable navigation.
Years ago, many of the first smartphones came with sirfstar chipsets or alike , so once again, why not now? That's the question that should not be ignored or forgotten.
A friend of mine, that would not dare to pay more than a 100 box for a phone, bought an ancient ETEN device on a sale for 40 box with that old windows mobile 5 and guess what...the internal gps get fast fixes just like any standalone gps device because it got the same sirfstarIII chipset
Why the heck, the expensive so called high-end smartphones of today are not build with better gps chipsets? Why A-gps? So we are forced to get data accounts?
And what happens when I want to navigate abroad? Roaming?
For data transfer and internet I use wifi; I have it at home and I find hotspots everywhere...I will save those extra 120 euros(or more) per year (data account costs)
And nobody will force me to get one(internet/data account); not even for gps navigation that I so much use..
I use gps navigation only offline, using a external bluetooth device on a daily basis and, many times abroad; it works like a charm on my SGS; and I am talking about serious GPS car navigation software like iGo, Sygic, Navigon etc. .
Don't even use Google maps or alike.
I cannot tell you how my sgs is doing on online navigation, I dont have a data account so I wont even try it.
But once Samsung get this online gps navigation thing fixed, you guys should concentrate your energy on the real issue:
The A-gps scam
And for all the corporations out there: Just deliver a device with a capable gps chipset and you will sell millions..
And for all the users out there: Just get a good compact external bluetooth gps receiver and stop nagging....
Thanks to 3rd party developers, the Android OS on my SGS can be "fooled" and I can connect any navigation software to my bluetooth gps receiver threw programs like Bluetooth Gps Mouse Unlimited and Gps Provider.
I do have to " allow mock locations" at settings first...
« »
¿Ein? You don need data to get GPS fix, A-GPS is only an aid to get faster fixes
I thtink you're a littel misinformed
LOL.. o boy.. the AGPS is to help say if your indoors so you can get a faster lock... the phone will work without it.
Ummm I can see why you would think what you think, but I do believe you are wrong.
Firstly: as far as I'm aware, the SGS has the same GPS chip as the latest TomTom standalone unit.
Secondly: I guess AGPS is a data feature, it uses the triangulation of cell towers and pulls information to assist a sat lock, but it is not really a different way of using GPS. Ultimately you still need to get a sat lock to use a GPS App.
So it may speed up this lock, but it won't replace it. It just means it'll take you a little longer to get a sat lock than without it.
So you have the choice use it or don;t use it, no-one is forcing you to use data.
Logicalstep
Oletros said:
¿Ein? You don need data to get GPS fix, A-GPS is only an aid to get faster fixes
I thtink you're a littel misinformed
Click to expand...
Click to collapse
Lol those online translators dont work that smoothly...
I don't need a data/internet account to use celular networks aid, that means a-gps.That mean going online via 3g or 2g...
But IF I don.t have a data/internet account added to my phone subscription, my phone costs will be much higher depending on my use....
You are missing the point anyway...
betoNL said:
Lol those online translators dont work that smoothly...
I don't need a data/internet account to use celular networks aid, that means a-gps.That mean going online via 3g or 2g...
But IF I don.t have a data/internet account added to my phone subscription, my phone costs will be much higher depending on my use....
You are missing the point anyway...
Click to expand...
Click to collapse
No, you're missing the point, you don't need any kind of data connection to use GPS, you can use it offline
Exactly...already the first line of Wikipedia says it: "Assisted GPS, generally abbreviated as A-GPS, is a system which can improve the startup performance of a GPS satellite-based positioning system."
There is, however, a related issue w/r/t A-GPS and a data account. Back on WinMo, I could download the ephemeris data to speed up the GPS fix for one week in advance (I think it was called QuickGPS or something on my HTC TouchHD, also had sth. like it on an old Eten). This allowed you to get a quick fix for said week, even without a data connection. Android, on the other hand, seems to download this data on the fly - meaning that if you don't have a data account you will experience a slow fix until your almanac has been filled "naturally" by the satellites you're seeing. I experienced that while on vacation this year without a roaming data contract - it took me a good 3-5 minutes to get the first fix and it was good from there on (well, as good as the SGS GPS gets ). I'd love to have some tool that does exactly what QuickGPS did, but I am not aware of anything like it.
TriC_101 said:
LOL.. o boy.. the AGPS is to help say if your indoors so you can get a faster lock... the phone will work without it.
Click to expand...
Click to collapse
I have always smile in my face when someone thinks he can get a lock indoors..
Yes in a cartoon box you can. Not in real building I'm afraid.
And for all those who think SGS's GPS is usable without A.
Try it.
You will see.
Dont post things you just caught on wikipedia.
xan said:
I have always smile in my face when someone thinks he can get a lock indoors..
Yes in a cartoon box you can. Not in real building I'm afraid.
And for all those who think SGS's GPS is usable without A.
Try it.
You will see.
Dont post things you just caught on wikipedia.
Click to expand...
Click to collapse
I can get a lock on 6-7 Sat no problem inside.... and so can lots of others.. don't know what your doing wrong but its not hard to get a lock inside.
Pics or it didnt happen
seems you all are little misinformed as to how the gps on android specifically sgs works. It is actually three systems at work here. Gps standalone without gprs and cell triangulation which gets lock within a minute same as standalone bluetooth units (they also take up to a minute from cold boot but because generally it is plugged in the car lighter and always on people think its blazing fast).then you have agps that downloads preloads data regarding satellite location in regards to your position via network instead of downloading same data directly from satellite thereby saving time. Both these can be used without checking network location in settings so to recap if your network location is unchecked you are still using agps as long as you have network connection (data connection that is).and samsungs system for agps being better than others cause it downloads data for while week as opposed to others downloading data everyone gps is turned on. Third level is network triangulation via cell towers that gets you that instant lock at the cost of accuracy useful mainly to let apps get your general location without having to engage real gps thereby saving power as well as give maps a chance to start calculating route while gps is still getting lock therefore appearing to operate faster.
Idan73 said:
Gps standalone without gprs and cell triangulation which gets lock within a minute same as standalone bluetooth units (they also take up to a minute from cold boot but because generally it is plugged in the car lighter and always on people think its blazing fast)
Click to expand...
Click to collapse
Standalone gps's got their batterys, and thus they start "warm".
Thing is, standalone SRIF3/4 gps gets a warm lock without any AGPS nor network triangulation within 5-10 seconds. SGS (and bunch of top-of-the pack devices) cant come even close to that.
the GPS on the SGS works fine offline
i don't even have data on when going on long road trips
you just need an offline GPS software with maps, like CoPilot or some other one you like
xan said:
Standalone gps's got their batterys, and thus they start "warm".
Thing is, standalone SRIF3/4 gps gets a warm lock without any AGPS nor network triangulation within 5-10 seconds. SGS (and bunch of top-of-the pack devices) cant come even close to that.
Click to expand...
Click to collapse
Sure they do. Sgs warm lock is 5 to 10 seconds as well. To test get the lock first then turn of data and network lock then start gps.restart of the phone same as restart of the standalone counts as a cold boot and takes about minute.
xan said:
Pics or it didnt happen
Click to expand...
Click to collapse
Here ya go.... I don't have to prove anything just look on youtube.. This is the phone on for just 10sec.. if I had waited it would get down to about 10 feet... this pic was taken in a room where I get the lowest signal. and I live in a Condo with 2 foot concrete walls.. I don't have a digital camera.. this was taken with my old Samsung dumb phone.. but it does prove you can get a lock inside no problem.. also if i'm in a house I can get 6-7 sats to lock in the condo 5 at the most in that room.
only 3 sats and maybe the walls are thin
Polarfuchs said:
only 3 sats and maybe the walls are thin
Click to expand...
Click to collapse
LOL Trust me the walls and not thin.. i'm on the 10th floor of a 25 floor Condo complex. I get alot more signal is a house.. Now my X10 can get about 7 Sats locked in the same room. and down to 5 feet. but the point was you can get a lock inside..
I'll try it.
I live in a 3 stories house at ground floor. The shutters are down and I'm 1 meter away from the windows.
After 3 Minutes I get 5 sats in view but none used.
I'll hang on.
Even after 10 Minutes I only have 5 satellites in View and zero in Use.
So no fix for me.
The numbers on top of the bars are from 15 to 25.
Logicalstep said:
Ummm I can see why you would think what you think, but I do believe you are wrong.
Firstly: as far as I'm aware, the SGS has the same GPS chip as the latest TomTom standalone unit.
Click to expand...
Click to collapse
Most of Tomtom devices got a SiRFstarIII™ GPS chipset
If the GS got such one the amount of GPS threads in this Forum would be reduced considerably
What is your awareness based on?
Oletros said:
No, you're missing the point, you don't need any kind of data connection to use GPS, you can use it offline
Click to expand...
Click to collapse
Idan73 said:
seems you all are little misinformed as to how the gps on android specifically sgs works. It is actually three systems at work here. Gps standalone without gprs and cell triangulation which gets lock within a minute same as standalone bluetooth units (they also take up to a minute from cold boot but because generally it is plugged in the car lighter and always on people think its blazing fast).then you have agps that downloads preloads data regarding satellite location in regards to your position via network instead of downloading same data directly from satellite thereby saving time. Both these can be used without checking network location in settings so to recap if your network location is unchecked you are still using agps as long as you have network connection (data connection that is).and samsungs system for agps being better than others cause it downloads data for while week as opposed to others downloading data everyone gps is turned on. Third level is network triangulation via cell towers that gets you that instant lock at the cost of accuracy useful mainly to let apps get your general location without having to engage real gps thereby saving power as well as give maps a chance to start calculating route while gps is still getting lock therefore appearing to operate faster.
Click to expand...
Click to collapse
LOL... Lets put things in perspective :
1) Wich car navigation software do you use
2) when you UNcheck wireless networks =a-gps(in location and security) and you CHECk "use GPS satellites = build-in gps receiver and then you go outside, you start your car navigation software in you gs( taking into consideration that you have the righ map installed) how long does it take to get a fix so you can start driving?
3) Do you know the difference between a cold and warm start? Why the heck some of you mention car lighters????
Please just answer me these 3 questions and meanwhile I will post some educative information

[Q] GPS without network, in planes. how ?

I wonder if it is possible to use my GPS without my mobile connection. I like to use GPS in the airplane with an offline navigation.
Whenever I turn off my mobile connection of my HTC DESIRE, the GPS gets lost too . Is there a way?
What application are you using for your GPS? Most apps pull the actual maps from the internet and don't store them internally which might be the reason you can't use your GPS when your network is off. I guess if you could find an app that has the reference to the maps locally and install the maps locally (about 1GB for the US) then you shouldn't have a problem.
http://androidcommunity.com/forums/f12/offline-gps-maps-20226/
Some discussion on the thread above regarding your topic. Many people have posted about it. Not sure what's out there.
it's first bcoz it can't download the maps from the net.
But even without this, if you're using GPS Essentials or GPSTest for example -apps which only display the GPS stats- you'll notice it doesn't work either. And this is because the chips in s-phones are A-GPS chips, which need an internet connection to download precalculated data about satellites approx. positions, almanach data, etc etc. This helps the chip in getting a GPS lock faster, but makes it internet-dependant (the data is valid for 6 days, provided you don't change location by more than 50 miles or so. But usually the device tries to download fresh data each time the GPS is 'cold-started' -first start after a reboot or some prolonged inactivity period- and falls back to the old data if there's no connection. Past 6 days, the data is flagged as 'deprecated' and isn't used anymore whatever the case may be)..
At first only a handful of smartphone makers implemented those chips because they're cheaper to produce and take less space (most of the calculations for determining the user's position is done by the CPU, the A-GPS chip mostly only collects the data, filters it and forwards it), but then some american government agency (can't remember if it was the one regulating automotive transportation or some other though) made it mandatory for all devices sold in the US, to help paramedics and other rescue services in locating injured car-drivers quicker and more efficiently (the theory behind being that an A-GPS chip equipped device demands less interaction from the user to start up the GPS function and get an accurate fix on the position. An A-GPS chip is *supposed* to be able to get a lock and fix all by itself once the GPS is started, so that'd be only a movement of the thumb for the injured person to launch a distress call -provided he/she is able to grab the phone, of course...). But they were a bit shortsighted -as usual, if I may say- in that if the driver 'choses' to crash in a remote location where there's no 2G/3G/4G carrier coverage, he's pretty much screwed anyways, unless he resorts to the good old voice-comm'..
And of course since the US is one of the main phone markets in the world, the same phones are winding up all over the world by now.
thanks for all replies.
it actually worked well in FLIGHT MODE. I used to pre-cache some maps which is possible since the new google maps update.
worked like charm
yea but this is because you got a HTC phone.. They're typically embarking better A-GPS chips than the norm (Qualcomm-made, for the most part).
They're better than the SirfStarIV I have in my SGS2 for example, not by their precision (which is roughly the same and even a bit superior for the SirfStarIv) but by their lock-on times and the quality of their reception (which relies a lot on the built-in antenna which seems to be better by HTC).
With my HTC Desire "S" I was often able to get a lock-on even within a building (=with no clear overview of the sky), just by standing near a window... With the Galaxy S2 I have to extend my arm as far out the window as I can to be able to lock a puny 4-5 sats... :/

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