I am requesting the resource for completing the piece of puzzles of NFC support I am tossing on the Samsung Galaxy Captivate Glide. I thought it wouldn't be possible but now I'll have to see - I am not willing to sacrifice my phone (my daily driver - but I don't mind bricking it because I am capable of recovering it). If anyone have dead SGH-I927 or otherwise, I would like to have a few picture of motherboard and the macro shot of chips so I can look for the datasheet, thus finding the correct driver for it.
P. S. Please take a real good macro shots of the chips because I would like to know the model numbers on it so I can find the datasheet (I am interested in trying to add support for the NFC). You can try using LED flash if that helps.
Plus, Moderators - you can move it to Captivate Glide General if needs to be - Tapatalk lacks the feature of being able to pull the post and move to different thread.
Sent from my SGH-I927 using xda app-developers app
Maybe the guy who opened his glide could help you: http://forum.xda-developers.com/showthread.php?t=1884472
Wait, are you trying to add a NFC chip to the phone? Or are you under the impression that the Glide has one installed? Because I think it's been pretty clearly worked out that there isn't a NFC chip on the Glide.
Just take the back cover off, it's 7 screws and the motherboard is right there, you don't even have to take aything else off.
Sent from my SGH-I927 using xda premium
I still think that square strip on the back of the battery cover has something to do with it but probaly not
Sent from my SGH-I927 using xda app-developers app
There are no contacts between the sticker and the body of the phone, so I doubt it's a NFC chip.
On top of that, nowhere is the NFC chip documented in the FCC test for the Captivate Glide. Were there one on the phone, Samsung would have had to report it to the FCC and it would have been noted in the reports.
Well, I do think it have NFC chipset since I saved the snaphot of Melvatron's phone - I opened mine before (dented camera cover so had to fix it).
Why? There are more than two antenna traces - I see four.
Plus, AT&T can do what they want with it, even going as far as desoldering the NFC chip.
Pyho said:
There are no contacts between the sticker and the body of the phone, so I doubt it's a NFC chip.
On top of that, nowhere is the NFC chip documented in the FCC test for the Captivate Glide. Were there one on the phone, Samsung would have had to report it to the FCC and it would have been noted in the reports.
Click to expand...
Click to collapse
Can we get this post stickied somewhere. I feel like this subject comes up unnecessarily often.
Hmmm... I wonder why GSMArena and many other cell phone review websites claimed that it have NFC. I would like to investigate for myself, maybe even try probing the IO for any signs of hidden hardwares (AT&T have been proven to be hiding things they don't want us to use, anyways).
Dr. Mario said:
Well, I do think it have NFC chipset since I saved the snaphot of Melvatron's phone - I opened mine before (dented camera cover so had to fix it).
Why? There are more than two antenna traces - I see four.
Plus, AT&T can do what they want with it, even going as far as desoldering the NFC chip.
Click to expand...
Click to collapse
Where are the four? I see two.
I've taken the Captivate apart before as well and I can tell you that I didn't see a single trace of a NFC chip on the board itself. The most common NFC chip manufacturer is NXP. NXP chips look like this:
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Here's another NXP chip on a Galaxy SII:
And yet another on the Galaxy Nexus:
Samsung's in house NFC chips look like this:
(The other model is SENHRN2 and looks similar.)
None of these chips are on the Captivate Glide. (If you don't believe me, I can try to provide pictures of the entire motherboard, although I'd need to find my camera charger.)
Also, there's still that FCC thing that I mentioned... If it was there, it would be documented.
Dr. Mario said:
Hmmm... I wonder why GSMArena and many other cell phone review websites claimed that it have NFC. I would like to investigate for myself, maybe even try probing the IO for any signs of hidden hardwares (AT&T have been proven to be hiding things they don't want us to use, anyways).
Click to expand...
Click to collapse
I'd imagine GSMArena made a mistake and other websites copied their data with the same mistake in it. (Or vice versa.)
AT&T would only be able to hide it at the software level. If the physical chip isn't there, there isn't NFC.
Ah... Ok. I guess so. I am not saying I don't believe you - sometimes I need to be sure, hence the analysis on both software and hardware.
Sent from my SGH-I927 using xda app-developers app
I am not willing to open my hardware for pictures on this phone but if I had another I would.
Samsung SGH-i927:
CWMR Touch v4.0.0.1
Keyboard fix
Superuser 3.2r3 ARM Optimized
Samsung SGH-i897:
A work in progress…
Stock & Rooted (need kernel and update)
Me too, unless I have to fix it but I will get the email with the picture of motherboard. Whether the NFC is confirmed or busted, will be up to the image of chipset (and the datasheet for it).
Sent from my SGH-I927 using xda app-developers app
I raise my hand to post some of mine, I don't have warranty in my country for it, and I am carefully enough to reeassemble it without ****ing it up.
You'll see the pictures by tomorrow from my 3GS crappy camera.
But I have a question that I'll appreciate you can help me with.
GPS is still screwed on ICS? because it sucks on the leak.
Sent from my SGH-I927 using xda premium
Ok. You can try the workaround: in sirfgps.conf, edit the line "LNA_ENABLE" from 1 to 0, and optionally switch "FREQUENCY_AIDING" from 0 to 1, and copy gps.conf from an Android that's known to lock immediately (I also posted gps.conf zip on my GPS workaround thread). It should be able to lock at least 5 minutes maximum from cold start.
The reason being, Samsung didn't really pay attention to the LNA circuit board placement, and/or the antenna in where the RF from CPU VRM (Voltage Regulator Module) is. There's more than one way to mess up a GPS electronics.
EDIT: If you have the information for the GPS band assigned for your country, you can try editing gps.conf directly after making a backup copy of this file - you would have good chance of finding out what band around here in XDA.
http://forum.xda-developers.com/showthread.php?t=1894250 - the workaround I have put up for this reason.
Sent from my SGH-I927 using xda app-developers app
Ever since I got the pictures from three2four of the SGH-I927 motherboard, I could now agree that the myth of having NFC is busted but I want to check under the SIM card then I'm good. (Thanks, three2four! I wasn't willing to open my own phone for any reason other than performing the repair on it.)
In the picture, all I see is audio DSP, DDR-II chip (soldered atop the CPU), GSM broadband modem chipset and GPS transponder processors and few support chipsets, and that's it.
EDIT: I am actually bummed out as I knew how useful it is, especially with the online purchase or running your own personal business while dealing with the credit card (Japanese Visa cards are a good example as they have been using the NFC for few years). Think of lot of uses for the NFC... Too bad it doesn't have that as I checked the pic.
Sent from my SGH-I927 using xda app-developers app
The picture of three2four's Captivate Glide motherboard didn't show the area where the SIM card' boards removed, so the curiousity have gotten the best of me, I decided to carefully disassemble my phone, and removed the SIM card board (It was glued onto the RF shield so I had to snap it off) and take the picture of the RF generator - even though I don't think it have NFC but who know at THIS point?
I already reassembled it back together so I can be able to post onto this thread.
Related
After carefully looking at the FCC filing internal pictures and a certain website that tears down phones. It is clearly apparent that our European models are missing the NXP NFC chip.
I had hoped to just change the battery to the ATT one, but I think we are screwed on NFC for now, until a new fangled microo SD might add it.
I picked up a Samsung Attain today(GS II) and looked all over for the NFC settings i couldnt find them. When i opened the back of the phone the battery read NFC like you had said. So this is hardware related ? We cant get an AT&T battery pop it in and have NFC work( after some tomfoolery of course)?
DJSYNTHVIRUS said:
I picked up a Samsung Attain today(GS II) and looked all over for the NFC settings i couldnt find them. When i opened the back of the phone the battery read NFC like you had said. So this is hardware related ? We cant get an AT&T battery pop it in and have NFC work( after some tomfoolery of course)?
Click to expand...
Click to collapse
Honestly that is exactly what I was thinking....
Sent from my GT-I9100 using Tapatalk
If you take a look at the NFC models one thing you notice they are slightly thicker, why? Maybe there's some internal for NFC? Too early to say whether the NFC battery actually contains the NFC chip but most likely it does. It's still disabled on the AT&T version, until someone figures out how to enable it etc and whether actually it can be ported over. Or if there even is a NFC module inside the phone as well.
Need to see tear aparts of the Korean models.
Don't you need 2.3.6 to support NFC?
Sent from my GT-I9100 using Tapatalk
jdsemler said:
Don't you need 2.3.6 to support NFC?
Sent from my GT-I9100 using Tapatalk
Click to expand...
Click to collapse
Nope, it's down to Samsung to implement this on their firmware. Korean models come loaded with a carriers app to make use of their services but plenty of other NFC related apps on market, 2.3.6 will make some improvements to NFC.
Sent from my GT-I9100 using XDA App
Do me a favor and go to phonescoop.com and look for the galaxy s2 att. Then click on the FCC filing number in the review. Click details at the FCC page and you will see internal photos. You will see the NXP NFC chip in the radio section. If you go to Ifixit.com and look at the tear down of the European model you will see a space where it goes. Not populated.
socalphil said:
Do me a favor and go to phonescoop.com and look for the galaxy s2 att. Then click on the FCC filing number in the review. Click details at the FCC page and you will see internal photos. You will see the NXP NFC chip in the radio section. If you go to Ifixit.com and look at the tear down of the European model you will see a space where it goes. Not populated.
Click to expand...
Click to collapse
Thanks, that's cleared up everything.
Sent from my GT-I9100 using XDA App
AT&T lost band 8 to make space for the NXP circuit. Our model is quad band 3G AT&T is tri-band 3G.
socalphil said:
Do me a favor and go to phonescoop.com and look for the galaxy s2 att. Then click on the FCC filing number in the review. Click details at the FCC page and you will see internal photos. You will see the NXP NFC chip in the radio section. If you go to Ifixit.com and look at the tear down of the European model you will see a space where it goes. Not populated.
Click to expand...
Click to collapse
Which page on the FCC report? Trying to find the NXP chip, not sure where to look.
Edit: Wait, dw I found it. Page 4, just to the left of the volume buttons. Interesting though, the unpopulated pins in the I9100 don't line up exactly with the I777. Actually, the whole radio section is completely different.
socalphil said:
After carefully looking at the FCC filing internal pictures and a certain website that tears down phones. It is clearly apparent that our European models are missing the NXP NFC chip.
I had hoped to just change the battery to the ATT one, but I think we are screwed on NFC for now, until a new fangled microo SD might add it.
Click to expand...
Click to collapse
you know you can buy the NFC enabled batteries for SGS2, right?
for example the new sprint version and T-mobiles version have NFC, but they are not part of the phone, rather they are integrated into the battery pack.
so, if i'm not mistaken, all you need to do is swap in a battery with NFC build in to make it work
It's more than just the battery. I suspect "NFC" batteries are simply giant NFC antennas. I have an NFC battery with my I9100, and I've tried flashing AT&T and Korean M250S/K ROMs and kernels to try and get NFC working, to no avail. Many SGS2 phones are definitely missing NFC hardware.
---------- Post added at 03:08 AM ---------- Previous post was at 03:07 AM ----------
As a side note, I'm hoping this comes out soon.
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Android 4.0 AKA Ice Cream Sandwich comes with NFC = You can make sure if NFC is available on your Device or not ...I think many know this
I'm probably going to get a starter pack with 48, 144 and 1k byte sizes but I was wondering what sizes others are using. I'll probably be posting back in a week or so to report how much data my various tags use.
I'm really excited about how powerful NFC could be for making phones easier to use. My only concern is whether or not 48 and 144 byes is enough for some of the things I want to do.
I'm interesting in turning off/on WiFi and Bluetooth when entering/leaving my house. Same with for my car dock but with GPS/Bluetooth. I'll probably put one in my wallet to turn off GPS/Bluetooth/WiFi (as a simpler way to turn off battery wasting signals). I've no doubt that I'll look into other things such as web/app shortcuts and adding contact information. I"m just not sure how much data each tag would take.
Yeah where can I get 5 or more?
I need to be able to write/read. Variety of sizes is good too. Located in Canada.
I'll put one in my locker haha. Disable wifi and go to vibrate and silence all apps with a tap. Then I'll use my "Enable" card to tap for full volume everything and then enable ringer and wifi.
Agreed I'm planning on picking one up and would love to set up NFC tags for everywhere i regularly go
Mine should arrive tomorrow. I haven't decided what do with mine. I use llama for location based changes. I'll turn one into a contact to keep in my wallet for business card data exchange. That leaves 9 blanks. Hmmmm....
Sent from my Galaxy Nexus using Tapatalk
Quick question..
What is that?
Sent from my Galaxy Nexus using xda premium
144 bytes is probably enough for most things you'd want to do.
Looks like 144 will be enough for you.
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Wow.
Got the phone a couple days ago. I knew about nfc but wow, this is awesome!
Roll on payday!
Buff McBigstuff said:
Looks like 144 will be enough for you.View attachment 856440
Click to expand...
Click to collapse
Agreed. The only thing I've used the larger tags for was storing a vCard. And if you want to make your scripts even sorter, you can always use NFC to launch a Tasker task which can be as long and complex as you would like.
HcMAX said:
Quick question..
What is that?
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
I was wondering the same thing. I havent heard of these before... what can I do with them?
jonnyg1097 said:
I was wondering the same thing. I havent heard of these before... what can I do with them?
Click to expand...
Click to collapse
If you take a look at my picture attached to my earlier post you'll see a list of activities (wifi on, bluetooth on, etc). Those are the things that the phone will do when you hold it near that specific tag. So if I put that tag just inside my door and scan it when I walk into the house the phone would turn on my wifi and bluetooth, check me in on latitude and turn my volume all the way up. You can also have a tag launch a Tasker task.
I've got a few 112byte tags from some ex-library books.
Ive got one as in leave/enter the house to turn off/on wifi. I Also have one on my nightstand to enable silent mode
112b is fine for what I need which is ideal
Sent from my Galaxy Nexus using xda premium
Buff McBigstuff said:
If you take a look at my picture attached to my earlier post you'll see a list of activities (wifi on, bluetooth on, etc). Those are the things that the phone will do when you hold it near that specific tag. So if I put that tag just inside my door and scan it when I walk into the house the phone would turn on my wifi and bluetooth, check me in on latitude and turn my volume all the way up. You can also have a tag launch a Tasker task.
Click to expand...
Click to collapse
omg that is the coolest thing ever! I gotta get me some of those. Thanks for the explanation.
Is there Cards & Stickers? or is it just different names on the same product?
Could someone point me to a card/sticker that works with our phones?
I have google it a bit but there seems to be many different types.
Cheers!
Idk about cards but that is one of my stickers next to a quarter for comparison.
Sent from my Galaxy Nexus using xda premium
I think I am going to play around with this. already LOVE Google Wallet. I have three quick questions though.
1. Is it recommend/necessary to purchase pre-formatted tags to use with the Verizon LTE Galaxy Nexus? I have just switched to Gummy ROM based on 4.0.3 (I know need to update my signature). From what I have read 4.0.3 will support formatting, but is it just easier to purchase pre-formatted tags? Better question: Is there a down side to buying pre-formatted tags?
2. Which app would you recommend to program the tags with?
3. Anyone know a reputable supplier of NFC tags for someone in the U.S.?
I appreciate any advice.
1. The tags I've bought are off of eBay some china seller. They are pre-formatted as NDEF no downside that I can see as they work perfectly
2. I use NFC Task Launcher from the market it works great. Also the NXP apps are good.
3. Everyone seems to say that tag stand.com are good I've never used them as I'm from the UK
Sent from my Galaxy Nexus using xda premium
jonnyg1097 said:
I was wondering the same thing. I havent heard of these before... what can I do with them?
Click to expand...
Click to collapse
Check out the thread here to see some of the hype. There is a cool program that lets you do all kind of neat things with tags.
http://forum.xda-developers.com/showthread.php?t=1359057
Sent from my Galaxy Nexus using xda premium
Dakota0206 said:
I think I am going to play around with this. already LOVE Google Wallet. I have three quick questions though.
1. Is it recommend/necessary to purchase pre-formatted tags to use with the Verizon LTE Galaxy Nexus? I have just switched to Gummy ROM based on 4.0.3 (I know need to update my signature). From what I have read 4.0.3 will support formatting, but is it just easier to purchase pre-formatted tags? Better question: Is there a down side to buying pre-formatted tags?
2. Which app would you recommend to program the tags with?
3. Anyone know a reputable supplier of NFC tags for someone in the U.S.?
I appreciate any advice.
Click to expand...
Click to collapse
1. 4.0.2 and earlier had a bug where they couldn't format tags. Apparently that has been fixed in 4.0.3. I got mine preformatted. the place did it for free.
2. I used NFC task launcher. The free full version posted by the developer is in a thread around here somewhere. It is also on the market for a couple of bucks.
3. I got mine from these guys located in Florida. They shipped fast and used Google Checkout so I didn't have to give them my cc number.
Just ordered some from tagstand.com
I didn't get pre formatted, but they were cheap... I will update when I get them
Sent from my Galaxy Nexus using XDA App
I'm really new to nfc, never used it before. I know Samsung released their version of nfc tags called Tectiles but I think they are too over priced for some stickers. I was wondering what size of nfc tags are good to buy and from where do you guys buy your nfc tags for cheap?
Sent from my SGH-T999 using xda premium
i would like to second this
Good question if anyone has any experience with NFC and the tectiles please help us out
I've done a little researching on this topic.
The Samsung TecTiles contain a Type 1 MIFARE chip with 1KB of memory.
The Galaxy S3 supports Types 1, 2, 3, and 4.
Type 4 NFC tags are capable of 2KB of memory.
I've found the Type 4 (MIFARE Desfire EV1 2K chip) here:
http://www.identivenfc.com/nfc-tags/google-nfc-tags-type4.htm
Type 1 NFC tags can be found here:
http://www.tagsforandroid.com/tags/Home.html
Beware, cause not all Type 1 NFC tags contain 1KB of memory.
+1 for tagsfordroid
and you get a free nfc keychain with your purchase!
FYI - Here's another thread discussing tectiles and generic nfc tags... http://forum.xda-developers.com/showthread.php?t=1749028
Is 1kb enough for let's say doing 3 things like turning blue tooth gps and navigation on? Or is 2kb type four needed for that? I'll check tags for DROID out. Btw what do u use the nfc key chain for?
Sent from my SGH-T999 using xda premium
circuit.007 said:
Is 1kb enough for let's say doing 3 things like turning blue tooth gps and navigation on? Or is 2kb type four needed for that? I'll check tags for DROID out. Btw what do u use the nfc key chain for?
Sent from my SGH-T999 using xda premium
Click to expand...
Click to collapse
I'm not sure yet how much can fit on the 1K tags, I don't have my S3 yet.
For the price at tags4droid, I went with those to play around with them and see what I can do with them.
The keychain could be used to toggle on/off a car mode (wifi off, gps on, bluetooth on if you have ford sync or similar etc...)
I've bought from tagsfordroid.com and use them with my work phone (HTC One X) at work and at home. I have a tag that silences the phone when I walk into a meeting and one at my desk that turns on wi-fi, bluetooth, starts SiriusXM and sets the volume to a specified level.
I use an app from the Google Market (I can't call it Play - it sounds too stupid) called NFC Task Launcher to program my tags. It's easy and the tags are rewrite-able so you can try out some tasks before settling on them.
I did a good bit of research before buying NFC chips. At $3 a piece, Samsung TecTiles are just 1k Mifare chips that they've branded for Samsung. The tagsfordroids are the same thing with a different sticker. I ended up getting 4k chips from Amazon (www.amazon.com/gp/aw/d/B006K3XWLK/ref=mp_s_a_1?pi=SL75&qid=1348809340&sr=8-1) for less than either of the other guys are selling them.
I'm using one at work to toggle wifi on, bluetooth & gps off, vibrate mode, and all volumes down. Since NFC is relatively new I'm sure more technology will be introduced that requires maximum space to take full advantage of it.
Hope this helps someone.
Here's a couple articles on Rootzwiki about NFC tags/apps. Watching the videos made me want to purchase NFC tags cuz they seem useful:
http://rootzwiki.com/news/_/articles/reviews/nfc-android-things-to-know-r1122
http://rootzwiki.com/news/_/articles/reviews/rapidnfc-tags-tags-and-more-tags-r1124
http://rootzwiki.com/news/_/articles/tagstand-nfc-tags-applications-r1123
Sent from my SCH-I535 using xda app-developers app
SlimSnoopOS said:
Here's a couple articles on Rootzwiki about NFC tags/apps. Watching the videos made me want to purchase NFC tags cuz they seem useful:
http://rootzwiki.com/news/_/articles/reviews/nfc-android-things-to-know-r1122
http://rootzwiki.com/news/_/articles/reviews/rapidnfc-tags-tags-and-more-tags-r1124
http://rootzwiki.com/news/_/articles/tagstand-nfc-tags-applications-r1123
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
I watched all these videos, thanks. The general census seems to be that 144 bytes is enough storage, according to these guys. Looks like the 5 tags I bought for about $11 (after shipping) is more than enough.
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The reason I opted for the most possible memory is because the task I use daily is a "switch" (changes my settings one way, then changes them all the opposite on the next swipe). Just one of the tasks in this switch is 111 bytes so 144 wouldn't cut it for me:
I'm hoping in the future that these chips will be capable of sharing content. Instead of linking websites and changing settings (which is super cool), actually store pictures, music, files, and upload to thr devices on a swipe. Just a thought, it might not be possible. In any case, I think I'm future proofed af least for a short while LOL.
Sent from my SCH-I535 using Tapatalk 2
joshw0000 said:
I watched all these videos, thanks. The general census seems to be that 144 bytes is enough storage, according to these guys. Looks like the 5 tags I bought for about $11 (after shipping) is more than enough.
The reason I opted for the most possible memory is because the task I use daily is a "switch" (changes my settings one way, then changes them all the opposite on the next swipe). Just one of the tasks in this switch is 111 bytes so 144 wouldn't cut it for me:
I'm hoping in the future that these chips will be capable of sharing content. Instead of linking websites and changing settings (which is super cool), actually store pictures, music, files, and upload to thr devices on a swipe. Just a thought, it might not be possible. In any case, I think I'm future proofed af least for a short while LOL.
Sent from my SCH-I535 using Tapatalk 2
Click to expand...
Click to collapse
Hi, can you give a link to the tags that you`ve bought? I mean that 4k tags
flash608 said:
Hi, can you give a link to the tags that you`ve bought? I mean that 4k tags
Click to expand...
Click to collapse
I bought those a long time ago. I honestly don't know if I could ever find them again. Try searching MiFare 4K tags.
Sent from my SCH-I545 using Tapatalk 4
Andy's Tags are great and reasonably priced!
http://www.andytags.com/
Hello Guys!
Decided To Wip up a Thread About Taking apart the Galaxy S3 for Sprint (Any model Really) after my Microphone suddenly Stopped working o_0 But Figured Out what the issue was
Fist off I will say that I am a Trained Tech From Sprint phone repair and I will In NO WAY POSSIBLE take responsibility for a Bricked/Damaged/Dead/ Phone Or ANY other possible problems that could occur after taking you're phone apart and taking apart you're phone may void you're warranty, please take you're phone to a certified repair center for work to be done.
Now that that is over on to the Dirty Works....
I was super Sketch the first Time and didnt realize How easy it is to take this phone apart.... but it's easy
Start here : -
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10 screws
Then just pinch into the battery well and pull up the main backing... XD
Issue found
RESERVED!
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MINE!
Sent from my SPH-L710 using xda app-developers app
I haven't torn mine down, but it's flipping hot where i live, i saw a video of the teardown on youtube, i was wondering about that heatsink on the back of the display/frame...
It's the gray colored square next to the word easy in the picture where your mainboard is disconnected.
Can you tell me if there was any thermal grease/heatsink paste?
If not i may consider tearing mine apart to add thermal grease so it can transfer heat away better (hopefully). I know how much of a difference it makes on desktop computers..
Thanks!
is there a sim card in there? I have acquired a sprint s3 and I am thinking about getting it on at&t some how. but I cant do that if theres no sim
Sprint version does not have a sim Card
It's cdma....
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jp6060 said:
is there a sim card in there? I have acquired a sprint s3 and I am thinking about getting it on at&t some how. but I cant do that if theres no sim
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Click to collapse
SIM cards only come in GSM phones, so this is not possible. It is possible to flash it to Verizon though, since VZW uses CDMA
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Ugh they're still using those Crap spring connectors...those were the reason the galaxy s had such poor GPS or degrading GPS over time
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The Verizon version has a SIM card being that LTE is a GSM based technology. Sprint's version has one, it's just embedded somewhere.
Sent from my SPH-L710 using xda app-developers app
gps antenna
which mmcx connector would be used for an external gps antenna?
possibility of adding card slot?
So I'm wondering about this. My friend has an old s3 from sprint and he said i could test with it. I wanna see if i could buy a replacement part with sim and the back housing to add the sim. And also use radio from tmobile to test. Not sure if it would work
you may have to be the best soldering expert ever to pull that off, and even then, haha. try it though, you could make a gsm/cdma hybrid device, thatd be cool!
bondosho said:
The Verizon version has a SIM card being that LTE is a GSM based technology. Sprint's version has one, it's just embedded somewhere.
Sent from my SPH-L710 using xda app-developers app
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Click to collapse
Embedded.... Very deep.... I bet you could add a Sim tray though, and it would work.
baconatorXVI said:
I haven't torn mine down, but it's flipping hot where i live, i saw a video of the teardown on youtube, i was wondering about that heatsink on the back of the display/frame...
It's the gray colored square next to the word easy in the picture where your mainboard is disconnected.
Can you tell me if there was any thermal grease/heatsink paste?
If not i may consider tearing mine apart to add thermal grease so it can transfer heat away better (hopefully). I know how much of a difference it makes on desktop computers..
Thanks!
Click to expand...
Click to collapse
Actually I wouldn't do that.... That stuff would get everywhere, and it conducts electricity too..... You could risk shorting your whole phone and frying it. However, if you made a like rubber ring or something what would keep it it place better, it would most likely increase the heat transfer. But keep in mind these phones, just like laptops, were designed to have higher heat tolerances.
sprint s3 sim reader problem
can anyone tell me where is the sim embed in the sprint s3?
i connect a gsm sim reader on the sprint s3 and the phone even turn on!!!
but when i disconnect it it turns very good.
please some one help me.
http://forum.xda-developers.com/showthread.php?t=2002515
Can anyone point out where on the the attached picture where the GPS antenna is for Captivate Glide?
I've read just about every "fix" involving various flashes and editions of gps.conf, and they're all bogus, as they are not consistent. (my opinion)
I've seen some other handsets on here with physical fixes by applying some action to a bit of hardware, and going to attempt the same...
However I cannot find anything, anywhere, with the info I want to get started.
Any help? Thanks in advance.
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Bigger photo here: goo.gl/CEhEq
Try editing sirfgps.conf instead. It sets the status of GPS controller. Go to line - "ENABLE_LNA = 1" and set it as 0 and optionally set "FREQUENCY_AIDING = 0" to 1. IMO, it's real silly trying to "fixing" the GPS problems on the outside, while it's simple to disable the LNA, it have fixed my problems. I also set up a thread concerning this workaround.
Sent from my SGH-I927 using xda app-developers app
sifgps.conf
It would seem playing with sirfgps.conf does bear fruit. So thanks for the pointer...
Also, simply removing the battery cover for a GPS lock yields upto 7-10 strength (based on monitoring using GPSTest.)
Combination of the two consistently gives me a lock in 5-10secs. Just annoying to do that before every bike ride....
PS. for the record if anyone is interested. The GPS antenna is immediately to the right of the headphone socket, if you are looking at the rear of the phone.
melvatron said:
PS. for the record if anyone is interested. The GPS antenna is immediately to the right of the headphone socket, if you are looking at the rear of the phone.
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Click to collapse
This is good to know thanks for that. I never had an issue with the GPS personally. Thanks for sharing this
Samsung SGH-i927:
CWMR Touch v4.0.0.1
Keyboard fix
Superuser 3.2r3 ARM Optimized
Samsung SGH-i897:
A work in progress…
Stock & Rooted (need kernel and update)
Aha. Interesting pointer, melvatron. Now if you think about the battery cover - there's graphite sticker which Samsung claimed to have the function as a heatsink (which is like a snake oil claim mainly because in reality it have NO contact with anything). Graphite can and does weaken the high-frequency RF, like GPS in some case.
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Dr. Mario said:
Aha. Interesting pointer, melvatron. Now if you think about the battery cover - there's graphite sticker which Samsung claimed to have the function as a heatsink (which is like a snake oil claim mainly because in reality it have NO contact with anything). Graphite can and does weaken the high-frequency RF, like GPS in some case.
Sent from my SGH-I927 using xda app-developers app
Click to expand...
Click to collapse
Seems like an odd observation to me, as it's nowhere near the GPS antenna. It's directly over the SIM card and SD card, which suggests to me it's intended to prevent radio interference with the tiny SIM/SD pins. (Where'd you find this "heatsink" claim?)
It might be in PDF version of the manual for this, mentioning the graphite sheet - on the inside of battery cover around SIM - for the heatsinking claim, the manual spelt out "Warning: Do not attempt to remove the graphite sheet from the battery cover. In doing so, may result in damage from overheating." I recall reading those.
And I take it back - I re-observed the whole thing.
GPS electronics have several downright strict design rules that must be followed during designing and prototyping stage: the clock source must be of clean and higher quality (temperature-controlled Quart oscillator - TCXO), and the proper capacitors with higher frequency response (about 0.1uF - can be MLCC as long as ESR meets the requirement of stabilizing DC rail going into both LNA and GPS transponder processor). Ever wonder why the traces on computer and phone motherboards looks SO DIFFERENTLY between 90s and now? That's mainly both RF and signal phase managements.
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---------- Post added at 09:08 AM ---------- Previous post was at 08:53 AM ----------
Re-downloading the PDF version of the manual so I can tell you what page you may want to see - about the Graphite sheet on the battery cover (dunno why it's there - but as they say, "if it ain't broken, don't fix it!").
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---------- Post added at 09:16 AM ---------- Previous post was at 09:08 AM ----------
Found it - page 4 of the manual - http://downloadcenter.samsung.com/c...-i927_Captivate_Glide_English_User_Manual.pdf
You can type in "graphite" in Adobe Acrobat reader and let it search for this keyword.
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Dr. Mario said:
Found it - page 4 of the manual - http://downloadcenter.samsung.com/c...-i927_Captivate_Glide_English_User_Manual.pdf
You can type in "graphite" in Adobe Acrobat reader and let it search for this keyword.
Sent from my SGH-I927 using xda app-developers app
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Click to collapse
I don't know if I trust user manuals, especially from non-English-native companies, to say the right thing -- even if you discount the massive opportunity for things to get lost in translation, explaining its likely true purpose (reducing EMI in circuitry on/near the SIM card & SD card) to someone that doesn't have any electrical background is likely an exercise in futility, so they often come up with excuses. And yes, removing it is very probably a bad idea. Worse, even, because it's likely to cause intermittent issues with no clear source, so you may never make the connection.
True, bro...
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