yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Nexus] Fire n mage:
charging port as in usb right? usb that's part of the phone? Your battery is dead right? I'm saying charge your battery externally without the phone. I'm sorry am I just not understanding? I'm just giving advice to turn your phone on lol not fix it.
[Samsung Galaxy Nexus] funnyangrykid:
You are correct. It is possible to take the battery out of the phone and place that battery onto an adapter on a wall socket. Never even touching the USB port on the phone.

Sent from my Incredible, very Vivid, One X'strordinary S-off HTC Rezound

http://www.speedtest.net/android/216418366.png
[Samsung Galaxy Nexus] crazyalaa:
The problem is that my computer doesn't recognize my phone cause of the usb port damage. Even when my phone is off and I put in my battery without having the phone plugged it shows on screen that my phone is "charging".
[Samsung Galaxy Nexus] Fire n mage:
So you're interested in fixing the problem and not simply having a phone that turns on? I understand, I didn't mean to be mocking either, just joking :P. Well in this case, you will have to buy a whole new phone sir, as far as I know. Sorry I could not assist
[Samsung Galaxy Nexus] crazyalaa:
Isn't there any private company/website in this bigass country and could repair my phone?! lol.
[Samsung Galaxy Nexus] cmstlist:
Considering that Google sells unlocked GSM units to Americans, I'm surprised to hear Samsung won't fix them.

Where in the States are you? Many big cities have a number of small shops where mainly Asian imported cell phones are sold, and they'll sell unlocking and reflashing services, and they'll offer repairs for just about anything. If you're in a small college town that might be more difficult. Up here in Vancouver BC, when I accidentally jammed a microSD into the SIM slot of a Huawei tablet and couldn't get it out, I went to an Asian mall in the suburbs and got it fixed perfectly.

No intention to stereotype here btw - most of the leading mobile devices are manufactured in Asia, which means a lot of the bleeding edge devices get imported before they're released here, and a lot of shops appear to be run by people who have connections to the countries they're importing from.
[Samsung Galaxy Nexus] Fire n mage:
Sure there are some, but some are sketchy, and most will rip you off lol
[Samsung Galaxy Nexus] cmstlist:
That's what Yelp is for ;)
[Samsung Galaxy Nexus] DroidHam:
I got a Galaxy S3 from work and am considering ending my personal line. Anyone know how much my early termination fee will be? I got my Nexus in December.
[Samsung Galaxy Nexus] gbarayah:
It's been a long time since I've been locked into a contract but generally the ETF is going to be between $200-250 and it should be prorated for the amount of time remaining on the contract. If they try to get you to pay the full amount, bring your best negotiating shoes.
[Samsung Galaxy Nexus] DroidHam:
Ehhh ill be saving 75+ a month for 14 months its worth it either way I guess
[Samsung Galaxy Nexus] luckylui:
Sprint is 350.

Vzw is 300-350

T-Mobile 200

At&T ??

:D

#Galaxy Nexus HSPA+
[Samsung Galaxy Nexus] martonikaj:
And they decrease it by a few $$ every month.
[Samsung Galaxy Nexus] donsh00tmesanta:
What if you get laid off

-----------

iphones are the creation of people with nowhere left to turn
[Samsung Galaxy Nexus] ac3theone:
$200-$275

Sent from my Galaxy Nexus
[Samsung Galaxy Nexus] Zepius:
Verizon starts at 350 and then goes down by 10 every month
[Samsung Galaxy Nexus] TJBunch1228:
Zepius got it right. If you're lucky you can get a big chunk of the ETF paid for by selling your Nexus on CL or the MP.
[Samsung Galaxy Nexus] luckylui:
Indeed they do. ETF blow!

#Galaxy Nexus HSPA+
[Samsung Galaxy Nexus] 95Z28:
How hard is it to simply check with your carrier!?
[Samsung Galaxy Nexus] hellot1M:
I work at sprint and its $350 for smartphones and $200 for feature phones. It goes down $20 a month after 6 months into the contract for smartphone and $10 for feature phones after 6 months into the contract

As for other carriers.. I can't imagine it being that much different.
[Android Q&A, Help & Troubleshooting] StreetkillnHD:
i recently ordered it and im wondering if anyone else has it. it looks like a great product and i like all the features.

if you have it can you give me some feedback on the device. i been hearing theres some wifi issues with certain devices.

please explain your experience with the product
[Android Q&A, Help & Troubleshooting] StreetkillnHD:
no body has it yet?? dam..
[Nexus 7 General] xboxexpert:
www.youtube.com/watch?v=EAnY8tRxGSg

Coming Internally Soon to a Nexus 7 near you...

This is the picture of the device EXTERNALLY;

What we are now trying to accomplish is internally setting this up. I ordered a microSD reb mount connector that will allow a ground to be present once the memory card is inserted. This will allow me to utilize the points for SWITCH and enable disable OTG mode. I also ordered a 5v step-up board to test another theory I would like to put in place, in short, not utilizing OTG mode at all.
[Nexus 7 General] zakafx:
haha, as if. i was just saying this to a friend today it would be better to do this instead of using a cable. good job.
[Nexus 7 General] xboxexpert:
I'm going to try my best if not make it internal have a CNC MFG'ed USB Dock by next week.
[Nexus 7 General] 3vo kid:
Very cool! Looking forward to see how this comes out :D

Sent from my Black "Destroy Mode" Nexus 7
[Nexus 7 General] kkl0wn:
Finally somebody that's diving into the deep end on this project. I like it. Keep it up.
[Nexus 7 General] the0bserver:
If this can be installed internally, this would prove to be a great solution to the OTG issue... Looking forward to watching progress :good:
[Nexus 7 General] khaytsus:
I assume you're aware that previous internal OTG's have interrupted USB communications, have you resolved that part (I assume being able to switch the OTG part in/out as necessary)?
[Nexus 7 General] Element515:
Oh, interesting... Get this done, or even a real nice compact USB dongle and I'll get a n7 and buy it from you!
[Nexus 7 General] xboxexpert:
Yes I am aware that this is a huge issue for anything data related. I also noticed that most diagrams for D+ and D- are backwards which might stop some progress, which it did in my case. See attached image for CORRECT wiring of a USB Port. I blew out at least 3 microSD Cards already but thats not a big deal to me. However the mouse and keyboard on a hub has been working flawlessly no matter how many times i switch back and forth. Seems like anything that needs to read FAT32 or NTFS is a big fail for me at this point. I think that is more a software problem then anything though.

I'd also like to add to others trying to complete something like this once the Sense switch is grounded 5V is provided out to the device to power it. If the sense switch isn't grounded then 5V is not being pushed only pulled to charge.
[Nexus 7 General] littleguy77:
I wish you the very best of luck, as I have been researching this avidly for awhile and sketching out possible solutions in my head.

I hope you and other readers have seen the numerous similar threads on this topic. As I think you are aware, the chief problem relates to retaining the charging/peripheral functionality of the nexus while also permitting it to act as host to mice/drives/etc. Your microswitch is a simple and clean solution for this, although as you mention on youtube you can't do both at the same time. I guess that would be the holy grail. I'm afraid some of the hackers out there are in for a nasty surprise when they complete their mods and realize they can no longer charge their nexus. Your microswitch eliminates that nasty surprise.

For the benefit of readers, here are some similar mod attempts that I've found most informative:

http://xdaforums.com/showthread.php?t=1866988

http://xdaforums.com/showthread.php?t=1854904

http://rootzwiki.com/topic/30797-op...in-micro-sd-card-reader-to-nexus-7-build-log/

Edit: Sorry xboxexpert, looks like we posted at the same time. Glad to see we're on the same page.
[Nexus 7 General] xboxexpert:
Retaining the charging isn't going to work with OTG mode on considering the 5V is pushed out in OTG mode not pulled in. Its like a break light in a car, reversed polarities + & - when you hit the break when you have your parking headlights on. I don't know of a way at this time because of hardware limitations to make charging work while in OTG mode. Meaning to power the device and have a MicroSD card work all the time is not going to happen in my mind right now. I could try charging while my wiring is plugged in but I'm pretty certain I'll blow at least one thing out on the nexus board.

P.S - 30 AWG Kynar wire (wrapping wire) is the way to wire anything in this tight device not Cat5 wire.... :/
[Nexus 7 General] littleguy77:
xboxexpert - Yes, we're in complete agreement. Simultaneous charging and hosting may be the mythical unicorn here, and I'm glad you (unlike some modders) recognize that before pulling out the dremel tool :).

The best lead I have on the simultaneous thing would be to implement what the USB spec calls "Accessory Charger Adapter". See Chapter 6, and in particular Figure 6-2 from the specification:

www(dot)usb(dot)org/developers/devclass_docs/BCv1.2_070312.zip

Two problems with ACA, however. I can't for the life of me find a vendor who sells one of these dongles (although there seem to be a few IC's now incorporating the spec). Second I think you would need to physically break the data traces leading to the original micro-b receptacle (the easiest place might be on the ribbon cable). Otherwise you would have data collisions between the internal device and any pc/peripheral/otg device attached to the micro-b receptacle. To permit pc/peripherals/ or other data devices to mate with the nexus, you'd have to install a second micro-ab receptacle into the nexus housing. At the end of the day, the original usb port could be used for charging only, while the new micro-ab port could be used to automagically connect to both peripherals (mice, thumbdrives, etc via otg cable) and hosts (PCs).
[Nexus 7 General] xboxexpert:
In theory if you were to in fact break the trace and split the 5v line to do either or since the only difference is 5v polarity is pretty easy in its self. Fitting it all in the unit with a device that does just that for a all in one effect is quite the contrary. I am however actively building a dock (mock-up) to do just this. So as this thread stated completely internal for what we are trying to acquire, speaking about now, it may be imposable.

Then again if KERNEL Devs were able to detect when the power cable was inserted somehow and switch off or program a feature to defeat this...we would probably be talking a different story. I recall the Nook Color had OTG capabilities that were kernel unlocked down the road. I wonder if I took a stroll over there and did some digging looking into its development if there might be some light shed on this issue. Also if its not a problem now for the Nook Color what was fixed...
[Nexus 7 General] littleguy77:
Rock on with the dock. I'll keep my eyes open for that thread :) I'm looking to build a gaming-oriented enclosure for my nexus, and if an external ACA solution can be found, I'll likely integrate that into my enclosure along with the joysticks, buttons, etc.

I too recall some progress with the nook color. IIRC the nook wasn't actually powering peripherals when in host mode, so the charging thing was a slightly different animal. I may be wrong on that.
[Nexus 7 General] xboxexpert:
I am going to remove the Sense wire to trip 5v through the port and instead test with external 5v power to the device. I wonder if the device powered externally will show in Stick Mount. If so I will tear this puppy apart tonight and pin out the entire board to find a solid 5v point. In theory I can as of now pin it to the red wire on the battery giving off 3.9v-4.0v but that would under power a hub but may power a sd card.

More progress tonight let me get back to work :)

Anyone interested in doing some reading about USB Host Support for Nook Color??

http://xdaforums.com/showthread.php?t=1459892
[Nexus 7 General] littleguy77:
There are a bunch of folks looking hard for a +5V pin other than from usb. It's actually not easy since the board is mostly 3.3V and batteries are in series at 7.4v. Before spending a lot of time on this, I would strongly urge you read the links in my post above (post #10). Especially the second link starting at post 14. Might save yourself a lot of headache. Hope this helps.
[Nexus 7 General] xboxexpert:
Yes we need to find the 5v regulator that regulates the 5v that comes out of the USB port once Sense is triggered. Its somewhere close just need to cut the trace and trigger it for a 5v point.

Also Google LM2940CSX or LM2940CSX-5 is what we would need to down-step the 7.4v line a better option for what we want to achieve. Also looks like that regulator may be the PERFECT fit in where the back camera would go and perhaps solder it to the area for heat reduction.

http://www.mouser.com/ProductDetail...Tw7kGbQ9TGCJPy01/W7fOCrYLg5Oxaj4RaijGJwdWejt/

Looks like I may have a few of those available. I'll see what I can do tonight.

=)
[Nexus 7 General] xboxexpert:
REQ ENTERED FOR 2003106-5PCS FOR DELIVERY

I requested (5) of those 5v regulators to test tonight from my stockroom. I'll have some solid progress a lot later on tonight.
[Nexus 7 General] nst6563:
where do you get 7.4v from when the leads from the battery are reading 3.7 and 1.7?

-unless you're adding the two 3.7v leads together to get 7.4v. In which case you'd need to sum the two leads before the 5v regulator drops the voltage to 5v. Unless that regulator can step up the voltage from 3.7 to 5v (haven't looked up the part #s yet)
[Nexus 7 General] littleguy77:
Two cells, 3.7V each, in series. (sorry was unclear) At least that's what they're saying in the other threads I referenced earlier. I can't confirm or deny, just passing along info...
[Nexus 7 General] xboxexpert:
Don't add the two leads together. I was mistaken about the 7.4v I haven't even started to poke around at least I have what i need if i find a line past 5v. I'll figure it out tonight or this weekend.

Sorry for the brief response I'm still at work.
[Nexus 7 General] littleguy77:
Boost and buck DC-DC converters have been discussed as one option. Using a simple LDO voltage regulator as the OP suggests is another option. There are some pretty small boost/buck dc/dc implementations, still not as small as the regulator option but perhaps more efficient.

One thing to note, if you circumvent the motherboard and pull directly from the battery, your internal card reader will still draw down the battery even when the tablet itself is turned off. Perhaps there are some smd pads on the motherboard (I'm thinking after one of the power regulation ICs) that are at 7.4 volts. If so, you could tap into the pad so that you only drain the battery when the tablet is turned on.

I would still suggest testing all this using an external +5V source for the reader. I'm still concerned that asserting the +5V line high from a hacked-in regulator will disrupt the nexus motherboard power management/charging logic.
[Nexus 7 General] brando56894:
If you get this to both charge and access the SD card at the same time, that'd be awesome. If not I'd be happy with having to flip a switch whenever I want to charge my device. :)
[Nexus 7 General] nst6563:
The two red leads are 3.7v, the other two are 1.7v. I've read them with a meter. Check out the rootzwiki linked a page back. I've got some info in there as well as ED209 that may prove useful to you. I've not completely torn down my tablet yet, but I've done some poking and proding on the back of the motherboard. As you can see in the rootzwiki pics I've got some of the points labeled. There are data +/- pads on the mb where the ribbon cable connects (from the micro-usb) - I think those are the same/shared data ports as on the Micro-USB (at least the continuity reads that way). So if you don't want to solder onto the small micro-usb ribbon cable you can use those points instead.

Good luck. I haven't had the time to tear into it further...and I didn't want to tear it all down until I had the funds to replace it should something happen.

The charging support may be a kernel hack. Similar to the OTG support, ParanoidAndroid supports the OTG drive natively while the stock based roms require stickmount or other similar app.
[Nexus 7 General] xboxexpert:
Youtube Explanation below. I talk about electronics better then I type about them...

www.youtube.com/watch?v=ngyBh0OZcpo
[Nexus 7 General] nst6563:
for the 5v switch point you have labeled - did you measure that with the device charging or OTG plugged in? That would explain why it read differently when I measured.
[Nexus 7 General] xboxexpert:
Sense switch point holds no voltage it's the point that needs to be grounded for 5v to be provided to the red points, not charging.

When charging however the RED points are 5v but when its not charging they are 0v until the yellow switch point is grounded.

Done for the night I didn't get my 5v step downs yet and I'm tired. Sorry if tonight was uneventful for ya'll. =)
[Nexus 7 General] littleguy77:
Very nice video xboxexpert and thanks for the hard work.

I think what you are witnessing is the behavior of the Nexus's OTG-certified USB transceiver. This is an IC situated on the main motherboard. One pin from the IC is connected to the ID (yellow) pin on the micro-usb receptacle, and another pin is connected to the VBUS (red) pin. As you say in your video, these connections are made from the motherboard to the receptacle by the ribbon cable. The IC contains logic that drives VBUS to +5V only when ID is shorted to ground, in which case the Nexus will go into host (A-device) mode. Under any other condition, the IC releases VBUS (allows it to float) and the Nexus goes into peripheral (B-device) mode. If a charger/pc is connected, then that trace will be 5V, driven by the charger/pc. If nothing is connected, then the VBUS line will fall to ground.

In addition to all this, I hypothesize that the transceiver IC is connected to the battery management IC either via a direct electrical connection (I2C) or via the kernel software. That way, when the transceiver drives VBUS to +5V, it also tells the battery management IC to suspend charging. Conversely, when the transceiver releases VBUS, it notifies the battery management IC so that it can resume charging if possible.

So here's the deal. If you drive VBUS to +5V (e.g. with a charger or direct connection from hacked-in regulator) while simultaneously shorting ID to ground, you enter a non-standard state according to USB spec. I hypothesize that in this case, the transceiver will go to a safe state by releasing VBUS, suspending data communications on D+ and D-, and will tell the battery management IC to suspend charging. That's just my guess. This might explain why other folks have witnessed wonky behavior where neither charging nor data access is possible when they add a charger, and then a total reboot is required to correct the mess.
[Nexus 7 General] littleguy77:
One more thing, then I need to go to bed. I've drawn up some high-level schematics showing the various modes that the stock nexus operates in, assuming it's following usb spec. Then I show how data and power collisions can occur if one simply wires an internal device directly into the usb bus. This doesn't account for your solution of adding a switch, however. Hope this helps and sorry if it only muddies things further
[Nexus 7 General] osmium2:
I am also following this thread and will spend sometime in the weekend trying to investigate the solution on my nexus 7.

I am not sure how the sense pin work, do you know how it check whether it is floating or not?

Adding a switch will definitely work, but if someone can explain the mechanism of how the sense pin check its floating state, we may able to find a better solution.

For the collision issue you raised, I believe it can be easily solved by adding a diode in the data and power to the OTG device.

(yes..the OTG device will then be automatically disconnected if the sense pin is grounded)
[Nexus 7 General] littleguy77:
The motherboard contains a USB transceiver chip that senses three things: shorts in the data lines, voltage being asserted, and the connectivity of the ID pin. For the latter, the transceiver may simply have a 1M-ohm pull-up resistor on the ID line, and it simply senses a logic level. If (and that's a big if) the transceiver is more sophisticated it may have an RC timing network or ADC/resistor network to sense the actual resistance between pin and ground.

I would be a bit surprised if a simple diode did the trick. Diodes are generally used for preventing electronic catastrophes if somehow the wrong voltage gets put on a line, a connector is plugged in wrong, etc. The transceiver should already contain a collection of overvoltage protection diodes and inrush current limiters. Adding another one may or may not change the behavior of the existing protection system, and may confound the sensing logic as well.
[Nexus 7 General] adroidx:
Hi guys, can you please school an ignoramus such as myself as to why this modification is needed? I've read several threads so far about this but have yet to see any specific discussions as to the advantages. I'm sure it's well known, I just can't seem to figure it out...

Thanks!

First one to reply gets a thank you! ;)
[Nexus 7 General] xboxexpert:
This allows you to basically house or adapt a external USB Device. Examples would be but not limited to External Storage, USB Hub, Mouse, Keyboard....etc.
[Nexus 7 General] littleguy77:
No problem adroidx. Right now, if you want more storage for your nexus, the easiest solution is to buy an OTG (on-the-go) adapter, and hook into the nexus micro-usb port. Works fine, but you have to live with a dongle on the outside of the tablet. That's ok if all you're doing is temporarily ransferring files, but some people would like to have loads of data and possibly apps available all the time. That means having a dongle attached all the time. Which leaves something to be desired for some people. This mod is basically trying to "clean up" the OTG solution by hiding it all inside the device. So permanent extra storage without a permanent dongle.
[Nexus 7 General] iAppleDev:
Storage flexibility and still be able to use the Micro-USB as stock for charging,syncing and OTG mouse,keyboard,storage,etc....
[Nexus 7 General] nst6563:
Have you (anyone really) tried the different impedence values as listed in the various sources I posted in here:

http://rootzwiki.com/topic/30797-op...to-nexus-7-build-log/page__st__60#entry935492

?? My Nexus is traveling with my son right now so I have no way to test it.
[Nexus 7 General] littleguy77:
No, but hopefully I will soon. Building a little usb breakout cable to test the +5v theories I discuss above, and then hopefully test the different impedances. I may actually implement the ACA using an Arduino. There's still a real possibility that the Nexus is not compatible with the ACA spec (it's a brand new spec). If that's the case we would be going down an entirely new rabbit hole.
[Nexus 7 General] xboxexpert:
I see a second problem looking at that diagram even if we were to find a alternate 5v source once a charger is plugged in the data lines are bridged meaning any device plugged in would cease to work.
[Nexus 7 General] littleguy77:
Exactly. This is a much more complex system than it first appears. The interoperability requirements are what make it hard.
[Nexus 7 General] Beamon:
Was waiting for something like that. Thanks :) . Though it'd have been more better if Asus could have simply installed some expandable sdhc slot :/
[Nexus 7 General] xboxexpert:
At times I like a challenge but what brilliant mind designed this thing to act like a child and be so uncooperative. In my mind they are pushing for Cloud Storage with this lack of functionality.

And my world would have been a slightly better place.