[Q] Galaxy Nexus NFC ( and SIV as well) - Samsung Galaxy Nexus

Hello,
Well it might be a basic question , but still baffles me a bit. I have a Galaxy Nexus i9250 and Galaxy S-IV. I am not sure I understand where "exactly" is the NFC chip located in both these handsets. Is the NFC built into the battery, or the mobile's mainboard itself.
If it is built in the mobile's mainboard, then why does it matter to always replace the OEM NFC battery with an aftermarket battery with NFC support. I can get it replaced with any stock battery and can still have NFC capability, correct ?
Can someone please elaborate and clear this confusion once and for all.
Thanks.

Both Galaxy Nexus and Galaxy S4 have the NFC chip on the motherboard BUT have the NFC antenna in the battery, so if you replace it with a general one it will NOT work.
Sent from Samsung Galaxy Nexus @ CM11

AndyYan said:
Both Galaxy Nexus and Galaxy S4 have the NFC chip on the motherboard BUT have the NFC antenna in the battery, so if you replace it with a general one it will NOT work.
Sent from Samsung Galaxy Nexus @ CM11
Click to expand...
Click to collapse
Thanks for clarifying. Just one more thing.
If I am using a wireless charger with either of these or other mobiles, then the induction charging sticker (with contacts to the phones mainboard where applicable) usually sits or piggybacks on the battery itself. In that case even if it is NFC enabled battery, will the NFC antenna work ? Has anybody tried making it work like this.
Thanks.

Ok got the answer....I may have to use an nfc antenna since s4 also had open contact points on the back for such an external antenna.
Sent from my GT-I9500 using Tapatalk

Related

[Q] Long term effects of using NFC (i777) batteries on i9100?

Genuine Samsung 1650mAh batteries are only $30 at an AT&T store--$15 if you have corporate accessory discount.
Picked one up for my i9100, seems to fit okay and everything seems to work ok.
After searching, i could find that some people are using the NFC batteries (either from the i777 or the Korean NFC GS2).
Has anyone experienced any detrimental side effects to using the NFC batteries in a non-NFC equipped i9100?
Is there any risk for that matter w/ using an NFC battery for our i9100's?
A quick search found this
http://forum.xda-developers.com/showthread.php?t=1292484
antonyfl said:
A quick search found this
http://forum.xda-developers.com/showthread.php?t=1292484
Click to expand...
Click to collapse
But that doesn't answer his question.
pmpntl said:
Genuine Samsung 1650mAh batteries are only $30 at an AT&T store--$15 if you have corporate accessory discount.
Picked one up for my i9100, seems to fit okay and everything seems to work ok.
After searching, i could find that some people are using the NFC batteries (either from the i777 or the Korean NFC GS2).
Has anyone experienced any detrimental side effects to using the NFC batteries in a non-NFC equipped i9100?
Is there any risk for that matter w/ using an NFC battery for our i9100's?
Click to expand...
Click to collapse
I've been using one for four months now, only issue for me is that the battery cover creaks a bit more when the NFC battery is used, and the usual issue that happens when swapping batteries, your charge information is less precise at the bottom of the scale.
This thread got me thinking, if one inserts the NFC capable battery from the at&t Mobility SGS2 into a GT-I9100 would it provide the same NFC capability that it provides to the at&t version?
Dan
dan1431 said:
This thread got me thinking, if one inserts the NFC capable battery from the at&t Mobility SGS2 into a GT-I9100 would it provide the same NFC capability that it provides to the at&t version?
Dan
Click to expand...
Click to collapse
Nope, people have been working on it, but nothing seems to work so far, the battery only has the aerial in it anyway so you need the software and for the chip to be wired up correctly.
Sent from my GT-I9100 using xda premium

Antenna ports behind battery cover?

Has anyone else noticed what look like antenna ports behind the battery cover? The battery cover isn't supposed to function as an antenna like the Thunderbolt, is it? Mine definitely doesn't have any contacts.
I believe the NFC antenna is in the battery.
I'm talking about the things labeled G, L1 C2, C1, L2.
Bump, does anyone else see what i'm talking about?
mirkendargen said:
Bump, does anyone else see what i'm talking about?
Click to expand...
Click to collapse
I see exactly what your talking about (pretty sure). Could it not be the barometric pressure sensor?
I dont have this...are you LTE?
Confirmed - LTE
My LTE has those antenna ports as well. I suppose you could plug in a laptop antenna and see what happens
I've got them on my lte
Sent from my Galaxy Nexus using xda premium
Its possible that they are ports for a wireless charging system that may come out for the nexus. I have noticed more phones are incorporating it in from beginning.
Sent from my Galaxy Nexus using XDA App
It does look like port for antenna, I don't think its for wireless charging back.
Those ports are used by the carriers to hook up their test equipment during the phone testing and certification process.
ITGuy11 said:
Those ports are used by the carriers to hook up their test equipment during the phone testing and certification process.
Click to expand...
Click to collapse
This is correct those are not really intended to be used as external antenna/amplifier ports. Those of you who want a correct connector it may be found here: wpsantennas.com
WARNING: Those connectors are really fragile and I have had to resolder a new connector after one of mine got stuck 'open' (wpsantennas put up a warning for that adapter).
I'm curious given all the talk of poor signal issues with the GNex... Would it be possible / beneficial to connect to one of these ports and coil / attach something to the battery door? I am certainly not suggesting I go experimenting, but if after research it turns into, buy this adapter, cut here, buy this, solder, attach here... that would awesome. Even a little improvement would make many people happy I think.
I have the GSM version of the gnex and I only have 1 antenna port on the back of my phone.
I've tried connecting a wireless antenna but the connection is too small, the gnex connection is a bit bigger than your standard wireless connector plug.
I'm assuming you need something special to plug into it ')
Sent from my Galaxy Nexus using xda premium
What about the one labled "G"? Is that a GPS hookup? I have the airwave at home and it happened to have a gps antennae in the box. If i recall correctly.... one end of that cable looked like it would connect to this port...
If i were to experiment, could I damage my phone?
btate0121 said:
What about the one labled "G"? Is that a GPS hookup? I have the airwave at home and it happened to have a gps antennae in the box. If i recall correctly.... one end of that cable looked like it would connect to this port...
If i were to experiment, could I damage my phone?
Click to expand...
Click to collapse
You could. I won't try it though.
Beamed from my Grouper.
Gnex connections
Based on my 1 yr. of robotics, I would say (just guessing ) that L1 and L2 stand for Line1(neg.) and Line2(pos.) and G(ground). As to C1 and C2, no idea. All these are probably intended for trained techs and could potentially turn your phone into a paper weight if used incorrectly. Just sayin'
btate0121 said:
What about the one labled "G"? Is that a GPS hookup? I have the airwave at home and it happened to have a gps antennae in the box. If i recall correctly.... one end of that cable looked like it would connect to this port...
If i were to experiment, could I damage my phone?
Click to expand...
Click to collapse
Once you attach an Antenna, it will open that port and it will be sick open meaning it won't ever work again without an Antenna. A friend of mine did this to the epic 4g
"best to be fresh"
dreamsforgotten said:
Once you attach an Antenna, it will open that port and it will be sick open meaning it won't ever work again without an Antenna. A friend of mine did this to the epic 4g
"best to be fresh"
Click to expand...
Click to collapse
I read that someone did the same thing with a AT&T SGS2
Sent from my Galaxy Nexus using xda premium
There was a thread around, if the antenna cable's pin diameter is too big, it will force the contacts open.
Beamed from Maguro

New Nokia Accessories Might / Should work with SG3??

Hi Guys,
Noticed these new accessories for Nokia but was thinking they should work with the Samsung Galaxy S3 (when we get the wireless charging case). What do you think?
http://www.nokia.com/gb-en/products/accessory/md-100w/specifications/
Speaker with NFC for pairing and starting music and wireless charging
http://www.nokia.com/gb-en/products/accessory/dt-910/
Wireless charging stand with NFC
http://www.nokia.com/gb-en/products/accessory/md-51w/
Speaker with NFC for pairing and starting music
http://www.nokia.com/gb-en/products/accessory/dt-901/
Wireless charging matt
http://www.nokia.com/gb-en/products/accessory/bh-940/
Wireless Headset with NFC for connecting
HTC-Gunge said:
Hi Guys,
Noticed these new accessories for Nokia but was thinking they should work with the Samsung Galaxy S3 (when we get the wireless charging case). What do you think?
http://www.nokia.com/gb-en/products/accessory/md-100w/specifications/
Speaker with NFC for pairing and starting music and wireless charging
http://www.nokia.com/gb-en/products/accessory/dt-910/
Wireless charging stand with NFC
http://www.nokia.com/gb-en/products/accessory/md-51w/
Speaker with NFC for pairing and starting music
http://www.nokia.com/gb-en/products/accessory/dt-901/
Wireless charging matt
http://www.nokia.com/gb-en/products/accessory/bh-940/
Wireless Headset with NFC for connecting
Click to expand...
Click to collapse
Pretty cool. But there still missing a magnetic plate in the S3. Therefore, wireless charging won't work. Unless you DIY yourself.
The S3 has an optional wireless charging battery door - and it uses the same Qi tech as Nokia, so it should work just fine. The NFC part may not be as easy, but the Tagstand tasker could solve that too.
I very much doubt any NFC stuff will work. It uses proprietary tag formats.
Dr.Paul said:
I very much doubt any NFC stuff will work. It uses proprietary tag formats.
Click to expand...
Click to collapse
There is another Nokia NFC speaker http://www.amazon.co.uk/Nokia-Unive...rround/dp/B005LBCFCE/ref=cm_cr_pr_product_top
One of the comments on there says now with Android Jelly Bean it works natively. However even if it didn't in this article it also describes how using a couple of apps you can make it work http://anders.tonfeldt.se/?p=1392
Get wireless speakers/headphones and put an NFC sticker on them.
Get a wireless charging matt and put an NFC sticker on it.
Probably a lot cheaper than what Nokia will want for a novelty product with NFC already included.

NFC Tags on a Touchstone

So I successfully implemented inductive charging into my Diztronic case so I decided to buy a few NFC tags to launch specific things when on certain Touchstones. Here I come to find out that when I put the NFC tag onto the touchstone the phone wont charge AND it won't detect the NFC tag. The tag works fine as long as it's not on the touchstone, and the touchstone works fine without the tag on it. Has anyone else encountered this issue and/or found a solution to NFC tagging touchstones?
On a side note, what is everyone's favorite NFC writer app? I'm currently using Samsung's new TacTile app and it seems to work pretty well (besides on my Touchstones...)
Some people have reported some strange NFC behavior when using inductive chargers, often when the charging coil sits right on top of the battery. The only possible fix would be to nudge the charging coil up so it doesn't sit over the battery as much.
ldp_frog said:
So I successfully implemented inductive charging into my Diztronic case so I decided to buy a few NFC tags to launch specific things when on certain Touchstones. Here I come to find out that when I put the NFC tag onto the touchstone the phone wont charge AND it won't detect the NFC tag. The tag works fine as long as it's not on the touchstone, and the touchstone works fine without the tag on it. Has anyone else encountered this issue and/or found a solution to NFC tagging touchstones?
On a side note, what is everyone's favorite NFC writer app? I'm currently using Samsung's new TacTile app and it seems to work pretty well (besides on my Touchstones...)
Click to expand...
Click to collapse
Where do u buy NFC tags I am interested in getting my self for my car dock
Sent from my Galaxy Nexus using xda app-developers app
Bfitz26 said:
Where do u buy NFC tags I am interested in getting my self for my car dock
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
Just go into Google Shopper and look up NFC tags. The Sony Xperia one's look cool and are my favorite.
ldp_frog said:
So I successfully implemented inductive charging into my Diztronic case so I decided to buy a few NFC tags to launch specific things when on certain Touchstones. Here I come to find out that when I put the NFC tag onto the touchstone the phone wont charge AND it won't detect the NFC tag. The tag works fine as long as it's not on the touchstone, and the touchstone works fine without the tag on it. Has anyone else encountered this issue and/or found a solution to NFC tagging touchstones?
On a side note, what is everyone's favorite NFC writer app? I'm currently using Samsung's new TacTile app and it seems to work pretty well (besides on my Touchstones...)
Click to expand...
Click to collapse
because the magnet of TouchStone may disturb the antenna of NFC .
see my solution: http://forum.xda-developers.com/showthread.php?p=37290004#post37290004

[Q] Add NFC antenna to GS3?

I have a Samsung Galaxy S3 which depends on the battery with a built in NFC antenna for NFC to work. I am currently using a 3rd party battery that doesn't have an NFC antenna. I would love if there is an option to somehow add an antenna externally, but not through the use of a microSD card if possible. Does anyone have any suggestions? Thanks!
Doubt it. NFC isn't just a matter of adding an antenna afaik.
pcorlatan said:
I have a Samsung Galaxy S3 which depends on the battery with a built in NFC antenna for NFC to work. I am currently using a 3rd party battery that doesn't have an NFC antenna. I would love if there is an option to somehow add an antenna externally, but not through the use of a microSD card if possible. Does anyone have any suggestions? Thanks!
Click to expand...
Click to collapse
It would be really be more feasible to just buy a different battery with NFC support. Trying to add an NFC antenna to the phone would be a lot more work than it's worth.
JunyuT. said:
Doubt it. NFC isn't just a matter of adding an antenna afaik.
Click to expand...
Click to collapse
I assumed the rest of the required hardware is built into the phone and just the antenna in the battery, but then again the antenna probably needs to receive power so I can see how that would be an issue. Thanks for your input.
TWO515TY said:
It would be really be more feasible to just buy a different battery with NFC support. Trying to add an NFC antenna to the phone would be a lot more work than it's worth.
Click to expand...
Click to collapse
Okay thanks, it's not too big of a deal to throw in an NFC battery when I need the functionality.
S3 need a antenna?
Sent from my GT-I9300 using xda app-developers app
tuansiro said:
S3 need a antenna?
Click to expand...
Click to collapse
Just as much as any NFC-enabled phone does... You know that the antenna is embedded in the inside of the phone, right?
Damastus said:
Just as much as any NFC-enabled phone does... You know that the antenna is embedded in the inside of the phone, right?
Click to expand...
Click to collapse
Actually on the SGS3 the NFC antenna is in the battery, not the phone.
Sent from my Transformer using Tapatalk 2
Actually I knew that since it was stated in the first post. I consider that still inside the phone.
I thought the user I answered to imagined something like this here as an nfc antenna.
While technically yes, you could make an antenna out of say aluminium foil if you could figure how to cut it so you end up with a tuned antenna, then connect it to the correct pin on the battery connector, I think any sane person would just stick an NFC battery in.
I think they put the antenna in the battery because it's up close to the back of the case. That would also keep it well away from the other antennas that I doubt would like the power pulses that NFC puts out while it's polling.
Oh and Damastus, that picture it hilarious.
I've done the wireless charging mod using Palm Pixi guts. That thin coil of wire is enough to break NFC communication, depending on where it's put. NFC has a VERY short range, so I'm sure it's in the battery to put it as close to potential NFC chips you want to read, and to minimize anything else getting between the antenna & chip (like cases, batteries, etc.)
TWO515TY said:
It would be really be more feasible to just buy a different battery with NFC support. Trying to add an NFC antenna to the phone would be a lot more work than it's worth.
Click to expand...
Click to collapse
On the Nexus S, the antenna is built into the phone's backplate.
In theory, you could buy a Nexus S back, remove that antenna, and put it on the inside of your phone.
Run fine wires from the phone's NFC antenna connections to the antenna, and it might just work.
I'd expect reception to be lousy, since you'll detune the antenna by trying to connect it. This also assumes that the NFC circuitry is in the phone, and the battery has only the antenna.
sysadmn said:
On the Nexus S, the antenna is built into the phone's backplate.
In theory, you could buy a Nexus S back, remove that antenna, and put it on the inside of your phone.
Run fine wires from the phone's NFC antenna connections to the antenna, and it might just work.
I'd expect reception to be lousy, since you'll detune the antenna by trying to connect it. This also assumes that the NFC circuitry is in the phone, and the battery has only the antenna.
Click to expand...
Click to collapse
Or..buy a battery with NFC support..
Sent from my Galaxy Nexus using xda premium
I got my extended battery (4300mAh) with NFC support from a Chinese manufacturer for only $15. I know you have to be careful with those, but this one seemed legit so I took a chance and it works great - last forever - AND has NFC. Here's the one I got: http://www.aliexpress.com/item/NFC-Extended-cell-phone-battery-with-cover-for-Samsung-Galaxy-S3-I9300-4300mAh/577969392.html
just take apart an OEM battery and start playing with it. My guess is what you want to do is VERY doable.
If I recall correctly, the Verizon SGS3 inductive charging back cover has the NFC element on the cover, not the battery.
Sent from my SPH-L710 using xda premium
nerys71 said:
just take apart an OEM battery and start playing with it. My guess is what you want to do is VERY doable.
Click to expand...
Click to collapse
I thought about that but I don't want to waste a perfectly good battery just to try, although it's tempting.
Mutiny32 said:
If I recall correctly, the Verizon SGS3 inductive charging back cover has the NFC element on the cover, not the battery.
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
I think you're right, however I'm pretty sure that's what the extra two pins under the battery are for. These pins are only on the Verizon version of the GS3 though, so it wouldn't work for my T-Mobile GS3. Thanks for the suggestion though.
buy a cheapy chinese battery that has NFC and "have at it"
As far as I have known, there is a type of NFC antenna available in the market that can be stuck to the back cover of your Galaxy S3. In this way, you can take full advantages of NFC functions of the Samsung mobile with an alternative mobile battery. However, it seems that most providers like Sunshine Good Electronics Company only do wholesales business on platforms like Globe Resources. You can search it on e-bay, maybe you will be surprised to find on retail seller.

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