[MOD] T-Mobile Note 2 wireless charging mod

siraltus · Jul 1, 2013

premiatul said:
I just got the Samsung wireless charger and it is very nice, with a nice design, BUT it is very 'sensitive". What I mean, is that if you move the phone even a 1/4 of an inch away from the center, it will stop charging.
The Chinese knockoff it has no such problem.
So, go ahead and get the cheap ones. ...
Other than that, everything works perfectly with this mod.

Sent from my SGH-T889 using xda premium

I opened my phone and thought about doing this mod, but running the wire, even a very thin one, causes the speaker cavity to not properly mate to the PCB and chassis the way it's described, which screws up several things:

Acoustic seal around the microphone no longer seals the mic tunnel to the microphone. This will screw up noise cancellation and call audio.
Less tension on the speaker and antenna contacts means at some point those connections can become intermittent. No thanks.
Dust seal around the USB connector no longer seals off the rest of the phone from dust. I don't want dust getting deep into the phone through the USB connector.

The only way to do this mod reliably is to route the wire outside the speaker cavity module, not under it, and have it enter the target solder point through the tiny space between the die-cast chassis and the cavity module in the middle of the module, but then the phone won't close properly, so a little filing of the plastic is required on the outer edge of the speaker cavity module.

All this trouble while my stock charger can charge the phone twice as fast? I'll stick with the stock charger.

premiatul · Jul 1, 2013

siraltus said:
I opened my phone and thought about doing this mod, but running the wire, even a very thin one, causes the speaker cavity to not properly mate to the PCB and chassis the way it's described, which screws up several things:

Acoustic seal around the microphone no longer seals the mic tunnel to the microphone. This will screw up noise cancellation and call audio.

Less tension on the speaker and antenna contacts means at some point those connections can become intermittent. No thanks.

Dust seal around the USB connector no longer seals off the rest of the phone from dust. I don't want dust getting deep into the phone through the USB connector.

The only way to do this mod reliably is to route the wire outside the speaker cavity module, not under it, and have it enter the target solder point through the tiny space between the die-cast chassis and the cavity module in the middle of the module, but then the phone won't close properly, so a little filing of the plastic is required on the outer edge of the speaker cavity module.

All this trouble while my stock charger can charge the phone twice as fast? I'll stick with the stock charger.

That's why I said to take it to a repair shop. They did it a little bit different than the OP.
From point A to the upper corner, they run a flat copper tape and from there a soldered solid wire to point C.
I have no problem with closing the cover, it is like it's nothing there.
They did cover the flat tape with some kind of liquid that hardens and isolates. It actually looks like factory made.

Sent from my SGH-T889 using xda premium

siraltus · Jul 1, 2013

premiatul said:
That's why I said to take it to a repair shop. They did it a little bit different than the OP.
From point A to the upper corner, they run a flat copper tape and from there a soldered solid wire to point C.
I have no problem with closing the cover, it is like it's nothing there.
They did cover the flat tape with some kind of liquid that hardens and isolates. It actually looks like factory made.

Sent from my SGH-T889 using xda premium

Resin lacquer over copper tape - good idea, but we're talking fractions of a millimeter tolerances here, it will still lift the speaker cavity module enough to break the airtight acoustic seal around the microphone and the dust seal around the USB connector. Take the module out and examine it very closely, you'll see there's an area where the module's thick enough to sit completely flush against the USB PCB, any lift there will lift it enough for the mic seal to fail. Copper tape gives me an idea on how to route it around the speaker module, though. I'll poke around this weekend.

premiatul · Jul 1, 2013

siraltus said:
Resin lacquer over copper tape - good idea, but we're talking fractions of a millimeter tolerances here, it will still lift the speaker cavity module enough to break the airtight acoustic seal around the microphone and the dust seal around the USB connector. Take the module out and examine it very closely, you'll see there's an area where the module's thick enough to sit completely flush against the USB PCB, any lift there will lift it enough for the mic seal to fail. Copper tape gives me an idea on how to route it around the speaker module, though. I'll poke around this weekend.

Well, I have no problem with the mic or anything else, PLUS I have now wireless charging.
Good luck with yours and if you have any new idea don't hesitate to share it here.

Sent from my SGH-T889 using xda premium

vinas1 · Jul 9, 2013

siraltus said:
I opened my phone and thought about doing this mod, but running the wire, even a very thin one, causes the speaker cavity to not properly mate to the PCB and chassis the way it's described, which screws up several things:

Acoustic seal around the microphone no longer seals the mic tunnel to the microphone. This will screw up noise cancellation and call audio.

Less tension on the speaker and antenna contacts means at some point those connections can become intermittent. No thanks.

Dust seal around the USB connector no longer seals off the rest of the phone from dust. I don't want dust getting deep into the phone through the USB connector.

The only way to do this mod reliably is to route the wire outside the speaker cavity module, not under it, and have it enter the target solder point through the tiny space between the die-cast chassis and the cavity module in the middle of the module, but then the phone won't close properly, so a little filing of the plastic is required on the outer edge of the speaker cavity module.

All this trouble while my stock charger can charge the phone twice as fast? I'll stick with the stock charger.

Your concerns are not a problem if you use thin enough wire. Many of us have this working since I posted the how to several months ago. Good luck with yours. :good:

vinas1 · Aug 8, 2013

The OP has been updated with new information regarding the exact reason why WiFi charging doesn't work. Check it out.
http://xdaforums.com/showpost.php?p=44314229&postcount=1

rubin110 · Jun 29, 2014

What gauge wire are you all using?

moonpie28 · Jul 3, 2014

I don't think it matters, the guy who did mine used hair thin and it worked fine. Like practically the gauge of a single strand of speaker wire.

rubin110 · Jul 3, 2014

I understand that. The question is more of, what's the thickest gauge I could go with so I can figure out if I've already got wire here I could use or should I order some. I only want to open the back of this thing up once. Thanks.

TeamHackura · Jul 5, 2014

Anyone want to buy my touchstone charger and receiver? Started to install but never finished

Sent from my SM-N900T using Tapatalk

rubin110 · Jul 17, 2014

So I've tried this install with the Qi charge for the Note II off of Amazon. The Qi charging base changes color when the pad is on top of it, but my Note II doesn't indicate that it's getting a charge. I'm running CM11 M8. I'm fairly certain my solder joins are good. Any help would be appreciated. Thanks.

vinas1 · Jul 21, 2014

rubin110 said:
So I've tried this install with the Qi charge for the Note II off of Amazon. The Qi charging base changes color when the pad is on top of it, but my Note II doesn't indicate that it's getting a charge. I'm running CM11 M8. I'm fairly certain my solder joins are good. Any help would be appreciated. Thanks.

I'm using with a Qi charger for many months now. I think the only real problem is making sure the phone is "squared up" on the receiver part of the charge pad. If the base changes color, that typically means that the Qi pad that you installed in the phone is receiving a charge from the Qi base. Some problems that I have ran into since I created this mod:

Charger amps - The Qi pad will drop the charge rate, to combat this make sure the charger is a 2000mA charger (the stock charger has always been recommended for this reason)...

Kernel - try a stock kernel until you get this working reliably. Some kernels try to charge at different rates, this can break inductive charging.

Connections - try holding your hand over the pins from the charge coil to make sure the pins are making excellent contact with the phone charge pins. Hold the connectors and move the phone to and away from the Qi base pad to see if it starts to work while you are holding it.

Qi Pad Quality - if you are sure you're doing everything correctly see if you can find a friend with another Qi pad that you can try. I've had cheap Qi pads not work.

If all of the above still doesn't work, my guess would be electrical issue. Good luck and I hope you get it working with the rest of us!

crazyn8 · Sep 4, 2014

Fast(er) Charging with T889 Wireless Charging Mod

Hey guys,

I don't know if someone has posted this already, but I thought I'd post my 2 cents... After doing this mod I was really disappointed with the ridiculously slow charging rate of 460mA. I was also surprised with the amount of BS on the "interwebs" regarding why the T-Mobile variant of the Note 2 (SGH-T889) was limited to such a slow charge rate. So after ordering a bunch of "wireless receiver pads" on Amazon, tinkering around with various ROMs and Kernels, and playing with several different Wireless Charging Stations, I've finally found a wireless setup that charges at 1000mA.

Here's the deal:

1) Not all "Wireless Receiving Pads" are created the same. What I'm calling a "Wireless Receiving Pad, is the $8-12 "coil pack/receiver" that sticks to the phone under the back cover. Basically, there are a bunch of geniuses online who claim that if you have a good quality wall-wart / AC charger (such as from a Blackberry, tablet, etc.) powering a good quality Qi Charging Station, then you will be ok. This is only half true. You are obviously limited to the OUTPUT (not INPUT) induced charging current of the Wireless Receiving Pad. Of the 3 I bought on Amazon, one maxed out at 500mA, one got 800mA, and another got 1100mA. I will post details of the one I ended up staying with which cranked out 1100mA. Being limited by the output of the charging pad was the first limitation I thought of, and God knows I'm no genius! So MAKE SURE YOU HAVE A WIRELESS RECEIVER CAPABLE OF A DECENT CHARGING RATE!!

2) Once you have selected a solid Wireless Receiver that is actually capable of outputting a decent induced charge, the next obvious step is to overcome the 460mA boundary set for USB charging. This is obviously controlled by the phone (hence plugging in different chords -ie: some with shorted Data +/- vs. non-shorted) result in different reference charging rates. This is easily resolved by using an aftermarket Kernel that's not half-baked like 80% of the Kernels out there. I recommend Agni's Kernel: http://xdaforums.com/showthread.php?t=2602053

I like Agni for many reasons, however in this specific scenario I really like the "Agni Control" app which will allow you to change the USB reference current up to 1200mA.

3) Use an app like Galaxy Charging Current Lite from the Play Store to determine your current charge rate.

That's pretty much it! It took me 40 minutes to write this article (at work, multitasking) and my phone charged from 66%-90% on a cheap $22 PowerBot Charger from Amazon! I'll post more details when I get a chance, such as pictures of the Receiver, Charging Pad, Kernel and ROM specifics, etc.

Cheers!

N8

Sherl · Oct 23, 2014

Does the t889 doesn't works with any other usb board? I have N7100 ordered for a faulty USB fix. Wont that work? or it will put phone in bootloop?

Product F(RED) · Oct 23, 2014

No. You need the T889 board. It has different chips on it.

Sent from my SM-N900T using Tapatalk

Sherl · Oct 24, 2014

Product F(RED) said:
No. You need the T889 board. It has different chips on it.

Sent from my SM-N900T using Tapatalk

@Product F(RED) Okay. Thanks!
Should I buy exact same board kind of? I mean I have Rev 0.7 R.CB2 (kh) 12 on the board and K2c19 on the connector strip. Does it need to match with the item they sell in eBay or any Rev board in eBay which is meant for t889!

Once again thank you so much.

Product F(RED) · Oct 24, 2014

jhbalaji said:
@Product F(RED) Okay. Thanks!
Should I buy exact same board kind of? I mean I have Rev 0.7 R.CB2 (kh) 12 on the board and K2c19 on the connector strip. Does it need to match with the item they sell in eBay or any Rev board in eBay which is meant for t889!

Once again thank you so much.

As long as it's got the T89 you'll be fine. I've replaced it before. Trust me.

Sent from my SM-N900T using Tapatalk

Sherl · Oct 24, 2014

Product F(RED) said:
As long as it's got the T89 you'll be fine. I've replaced it before. Trust me.

Sent from my SM-N900T using Tapatalk

@Product F(RED)
So Suggested to go with same revision or the latest one (0.8/1.)?

Product F(RED) · Oct 25, 2014

I think you can go with the latest.

Sent from my SM-N900T using Tapatalk

toocool7610 · Mar 20, 2015

crazyn8 said:
Hey guys,

I don't know if someone has posted this already, but I thought I'd post my 2 cents... After doing this mod I was really disappointed with the ridiculously slow charging rate of 460mA. I was also surprised with the amount of BS on the "interwebs" regarding why the T-Mobile variant of the Note 2 (SGH-T889) was limited to such a slow charge rate. So after ordering a bunch of "wireless receiver pads" on Amazon, tinkering around with various ROMs and Kernels, and playing with several different Wireless Charging Stations, I've finally found a wireless setup that charges at 1000mA.

Here's the deal:

1) Not all "Wireless Receiving Pads" are created the same. What I'm calling a "Wireless Receiving Pad, is the $8-12 "coil pack/receiver" that sticks to the phone under the back cover. Basically, there are a bunch of geniuses online who claim that if you have a good quality wall-wart / AC charger (such as from a Blackberry, tablet, etc.) powering a good quality Qi Charging Station, then you will be ok. This is only half true. You are obviously limited to the OUTPUT (not INPUT) induced charging current of the Wireless Receiving Pad. Of the 3 I bought on Amazon, one maxed out at 500mA, one got 800mA, and another got 1100mA. I will post details of the one I ended up staying with which cranked out 1100mA. Being limited by the output of the charging pad was the first limitation I thought of, and God knows I'm no genius! So MAKE SURE YOU HAVE A WIRELESS RECEIVER CAPABLE OF A DECENT CHARGING RATE!!

2) Once you have selected a solid Wireless Receiver that is actually capable of outputting a decent induced charge, the next obvious step is to overcome the 460mA boundary set for USB charging. This is obviously controlled by the phone (hence plugging in different chords -ie: some with shorted Data +/- vs. non-shorted) result in different reference charging rates. This is easily resolved by using an aftermarket Kernel that's not half-baked like 80% of the Kernels out there. I recommend Agni's Kernel: http://xdaforums.com/showthread.php?t=2602053

I like Agni for many reasons, however in this specific scenario I really like the "Agni Control" app which will allow you to change the USB reference current up to 1200mA.

3) Use an app like Galaxy Charging Current Lite from the Play Store to determine your current charge rate.

That's pretty much it! It took me 40 minutes to write this article (at work, multitasking) and my phone charged from 66%-90% on a cheap $22 PowerBot Charger from Amazon! I'll post more details when I get a chance, such as pictures of the Receiver, Charging Pad, Kernel and ROM specifics, etc.

Cheers!

N8

Hi

I have international galaxy note 2 N 7100 , i also have 460 charging current on my note 2 wireless charging, which kernel will work best for me?

[MOD] T-Mobile Note 2 wireless charging mod

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