Develop Bugs

Using your phone as a card substitute via NFC

At my college dorm, we use a certain type of lock in which we put our keys up to the lock, and it unlocks. I figured it used NFC, but I wasn't sure. Then I found this article.
androidauthority/forgot-your-olympic-hotel-room-key-use-your-s3-103325/ (NOTE: As a new user, XDA won't let me post outside URL's. Type in .com after droidauthority for the link to work)
I've got no clue what kind of hardware is in those locks, but I can say that it looks EXACTLY THE SAME as the locks used in my school. For me, that essentially confirmed they use NFC. I don't know who makes those locks, but my school uses the same looking handles and lock mechanism. When the card is held up to the lock, the lock flashes green. If I had to guess, the card acts as an NFC tag. When held up to the door, it will activate my card as any other NFC tag, verify it's me, and then let me in.
Using NFC on my phone, I was wondering if it was possible to do the same! From a logical standpoint (not a dev's standpoint), I would need to somehow steal the info off my card, have it stored in my phone as a usable format for the lock, and then I should be able to just hold the phone up to the lock to have it open!
You guys think this is possible? How would I go about doing it?

sorry that i don't have the answer, but i had this same idea! also wondering if it's possible.

Can.I.Haz.Jelly.Bean? said:
At my college dorm, we use a certain type of lock in which we put our keys up to the lock, and it unlocks. I figured it used NFC, but I wasn't sure. Then I found this article.
androidauthority/forgot-your-olympic-hotel-room-key-use-your-s3-103325/ (NOTE: As a new user, XDA won't let me post outside URL's. Type in .com after droidauthority for the link to work)
I've got no clue what kind of hardware is in those locks, but I can say that it looks EXACTLY THE SAME as the locks used in my school. For me, that essentially confirmed they use NFC. I don't know who makes those locks, but my school uses the same looking handles and lock mechanism. When the card is held up to the lock, the lock flashes green. If I had to guess, the card acts as an NFC tag. When held up to the door, it will activate my card as any other NFC tag, verify it's me, and then let me in.
Using NFC on my phone, I was wondering if it was possible to do the same! From a logical standpoint (not a dev's standpoint), I would need to somehow steal the info off my card, have it stored in my phone as a usable format for the lock, and then I should be able to just hold the phone up to the lock to have it open!
You guys think this is possible? How would I go about doing it?
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Click to collapse
I dont think these use the same frequency. Here in my office we use the HID Prox cards, but its not the same, the easiest way to know if you could do this is get the NFC tag reader software on your phone and try to read the card/key if it will see it I would think you might have a chance, if it doesnt see the card to read it, its not the same and you will not be able to do this.

wiz4769 said:
I dont think these use the same frequency. Here in my office we use the HID Prox cards, but its not the same, the easiest way to know if you could do this is get the NFC tag reader software on your phone and try to read the card/key if it will see it I would think you might have a chance, if it doesnt see the card to read it, its not the same and you will not be able to do this.
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Lol first thing I tried when reading this thread, but no go, we use the HID Prox cards to. Tried almost every NFC app in the market.
sent from my iPhone killer

from what i've read...
doing what you're suggesting would pose a major security threat to all electronic door locks around the world. you're essentially duplicating your electronic key, which is not unlike duplicating an old school lock/tumbler key. unlike a traditional key however, this is an electronic key which means if you're able to duplicate it, you're also able to send/share it with friends around the world. in other words, we can set up a database of all the dorms / offices locks around the world and we can all have free access. doesn't sound like a pretty picture.
in reality, what our phones are capable of doing is READING the NFC tags. so if anything instead of thinking of your phone as the key, your phone can do the exact same thing as the lock, which is read the info off of the NFC tags. i know we have the ability to WRITE info onto NFC tags as well... but as others have posted there are issues of frequencies and i believe encryption which I HOPE makes this not possible for my security sake.

I'm sure if its physically possible(frequency wise) someone will make it happen. Its just like droid sheep, air crack, wifikill and the likes. Doesn't make it right but throw the technology out there and someone will make use of it.
sent from my iPhone killer using tapatalk 2

I was able to do this with bluetooth and my Samsung Note 3 on Windows7. Got windows 10 and *poof*, it's gone as a bluetooth service. Now I'm scratching my head trying to figure out if that was a function of the BT dongle software, Dell security tools, Windows 7, or what!? A little off topic (not-NFC), but I have the same functional objective.

[Q] NFC issue

So I purchased some NFC tags from tagsfordroid.com! Tags arrived, tried using them, nothing! I know I need to erase them first, but it seemed I couldn't even read then. (Yes my NFC was enabled under Settings).
I grab my Nexus 7, enable the NFC and try reading them there, works great. Read/write, no issues. My S3 won't read them. Then I remembered reading about NFC not working with the extended batteries (which I don't have), so I checked my battery. Sure enough, it does say Near Field Communication on it! I borrowed a friend's S3, swapped the batteries to test it and the NFC works fine on my phone!
Then I figure, ok, I will contact Samsung support to see if they can't help me out! First reply back to me, they tell me to do a soft reset by pulling the battery. Obviously I did this, since I actually swapped the batteries. I told them this in the reply back. Said that a different battery allowed my NFC to work fine, so my battery seems to be defective. Their last reply to me was...
"We understand that you are facing an issue while using NFC function. We also understand that you are able to use the feature by replacing the battery.
We see that NFC(Near Field Communication) is related to the phone software but not the battery.
As the issue persists after performing the soft reset, please try performing hard reset on the phone to fix the issue."
Is Samsung just COMPLETELY clueless here or am I the one missing something?! If someone here actually thinks that wiping my phone will actually fix the issue and not be a waste of time, then I will do that!

PhoenixIce22 said:
Is Samsung just COMPLETELY clueless here or am I the one missing something?! If someone here actually thinks that wiping my phone will actually fix the issue and not be a waste of time, then I will do that!
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Click to collapse
Just tell Samsung you did it and want a replacement device or battery. I had the same issue and took it into my ATT store, they replaced the entire device after I showed them that it would not write to a tag.

Is it possible to recover data from a truly bricked phone?

I used these searches before compiling this thread;
"how to recover data from a bricked SGN"
"data extraction from a SGN that will not boot"
"removing the HD from samsung galaxy nexus"
These searches did not yield results that replicate my situation. The only search that resulted in many entries were for people with "bricked phones" that (at least somewhat) responded to input. I associate the term "bricked" with a phone that does not respond to input, or show any indication of getting power.
My phone is a Samsung Galaxy Nexus on verizon wireless. It has been rooted and is running a custom ROM by...AOKP i think. I had some assistance each time I rooted and updated my ROM.
Here is my problem, what caused it,my troubleshooting steps, and what I'm trying to do. My phone was partially submerged in water for an unknown amount of time. The battery and SIM were removed and kept in a water proof container within an hour of submersion. The water damage indicator stickers (on both the battery and the phone have not been triggered). About 24hrs later, the phone was placed in a zip lock bag with 4 desiccant silica gel packs where it will remain for the next 24. Per vzw's tech support, I tried to power the phone on using the charger and the battery removed. No change. Verizon was not advised of the partial submersion, only the non triggered water damage stickers. This phone is under warranty and a replacement has been shipped. I confirmed that my contacts are backed up to google.
The reason for this post is, I have close to 30GB of pictures and videos that I stored on this device's "internal SD" that I want to recover. Looking through the searches I mentioned above, it sounds like this isn't so much a separate card, but more of a partition on the phone's HD. I have been told by vzw that neither their branch office tech support, nor their recovery/diagnostic team that analyzes returned phones has the capability to remove and return this data.
If someone here has hardware experience with cracking open a SGN and swapping the "internal SD card" I would greatly appreciate any information available for this task.

if it cant turn on, you cant retrieve data.

Zepius said:
if it cant turn on, you cant retrieve data.
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Well..OK. I'm not ready to give up just yet. When my desktop PC's power supply failed, the PC was unusable, and didn't indicate power. I swapped that out and it now it works fine. This seems like it could be a similar situation. I at least want to exhaust every option I have before throwing in the towel.
Those 30GB contain hundreds of pictures of the first 2 years of my kid's life.
It seems to me that data recovery should still be possible if an replacement power source is utilized. Maybe more than just the power source has failed. Maybe every other hardware component in my wet phone has failed. But maybe, that "internal SD" is recoverable.
If anyone here knows what the "internal SD" looks like, and has successfully swapped one, I'll risk it. I know I can't trust vzw with such a task.
I realize this is a developers forum, and I'm asking for hardware failure advice. If anyone can refer me to a different forum that is more specialized to my specific task, I'll gladly take my trouble there.
Thanks for reading,
Jef

you're assuming 1 thing. the nand that houses the storage is in good health. When water is introduced, you have the unknown factors of what it does to circuitry.
im sure there is a ifixit teardown showing where the nand is. The problem is its soldered to the mainboard of the phone. You might be able to unsolder it, but thats a stretch.

Zepius said:
you're assuming 1 thing. the nand that houses the storage is in good health. When water is introduced, you have the unknown factors of what it does to circuitry.
im sure there is a ifixit teardown showing where the nand is. The problem is its soldered to the mainboard of the phone. You might be able to unsolder it, but thats a stretch.
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Thank you very much Zepius. I googled "ifixit teardown samsung galaxy nexus" which lead me to a page (that I'm not able to paste here as a new user).
which is exactly what I was looking for. I wouldn't go so far as to say that I'm assuming the nand is in good health, just wishful thinking.

Anncoco - sorry, I don't remember what I did with this. It's been about 4 years, and this was 3 phones ago. I think I had some of the photos backed up somewhere else, enough that I never went to the trouble to disassemble the Nexus. From my notes - I remember the phone did not indicate it was getting power when plugged in.

Is there a way to Disable Moisture Sensor by adb/terminal?

I'm getting the moisture popup all the time....
I've read and confirmed that the oldBatteryWaterConnector value is returning True when the error happens and False when I can charge normally....
I know the risks of forcing if, but is there a way to force it always be False or something like that?
Or a way to disable the sensor, or anything... It's maddening and I'm positive the port is not obstructed nor wet.... I never get near water with the phone...
It's a oversensitive sensor and there should be a way to disable.....
Please, an idea that do not involve "Dry it" 50 times a day or reboot it all the time I want to get fast charging working again [which works every time without complaints of moisture btw]
SM-A720F, HadesRom v6, MagiskRooted
Thanks in advance

This problem is bugging a lot of people like you and me. I am also still waiting for some genius mind to come up with a fix or work around.

I'll contribute $50 to a bounty to someone who can disable this. It is obviously a software limitation, especially since they programmed in a bypass to allow charging by restarting and plugging in the cable upon the splash screen. I hope someone finds a software bypass.

scarletwahoo said:
I'll contribute $50 to a bounty to someone who can disable this. It is obviously a software limitation, especially since they programmed in a bypass to allow charging by restarting and plugging in the cable upon the splash screen. I hope someone finds a software bypass.
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I don't think there is a dedicated sensor. I am guessing that power is fed into one more contacts and it detects when there is slight voltage coming back in another contact. So it should be pretty simple if someone knew where to look for the code.

SnowFuhrer said:
I don't think there is a dedicated sensor. I am guessing that power is fed into one more contacts and it detects when there is slight voltage coming back in another contact. So it should be pretty simple if someone knew where to look for the code.
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Click to collapse
Running into more Samsung issues. They put restrictions onto WiFi tethering with the latest on the go update. I have the international Exynos version, so the bootloader is unlocked and I can downgrade until I find a suitable replacement.. I predicted Samsung will turn into Apple; this is the last Samsung phone I will purchase and I will shoot it in the plinking range. It's sad, just like Apple, they had superb hardware, but some of the most restrictive software.

scarletwahoo said:
Running into more Samsung issues. They put restrictions onto WiFi tethering with the latest on the go update. I have the international Exynos version, so the bootloader is unlocked and I can downgrade until I find a suitable replacement.. I predicted Samsung will turn into Apple; this is the last Samsung phone I will purchase and I will shoot it in the plinking range. It's sad, just like Apple, they had superb hardware, but some of the most restrictive software.
Click to expand...
Click to collapse
You are sure that isn't the carrier restricting tethering?

Question Need help with frp lock

So I'm relatively new to this sort of thing. I've bypassed a few frp locks manually without a PC but I've been unsuccessful so far trying to bypass the frp for the Samsung Galaxy Z Fold 3. Can anyone point me in the right direction? Maybe to a legit online frp removal service or the latest manual bypass. Thanks in advance for your help.

Why would you need to bypass the FRP lock? Just doing some background reading into it, it's there for a very good reason to protect user data.
If the phone is yours and you simply can't remember the Google account credentials, then I would suggest contacting them.

Factory rest, then find someone with a one's 9pro (only one I did this with so cannot attest to other models working). On the one plus turn on mobile Hotspot with open security, in set up screen on galaxy connect to the one us Hotspot, log in to your Google account like normal. Has worked on all the galaxy phones I've tried since I accidentally discovered this last month. Have no explanation as to why this works but it blew my mind

m_w_clarke said:
Why would you need to bypass the FRP lock? Just doing some background reading into it, it's there for a very good reason to protect user data.
If the phone is yours and you simply can't remember the Google account credentials, then I would suggest contacting them.
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Click to collapse
The phone was not originally mine. It belonged to a guy that I work with. He bought 2. One for him and one for his girlfriend. When they split up, just a few days after....She gave the phone back but was apparently reluctant to sign out of her Google account.

aarontmartin1994 said:
Factory rest, then find someone with a one's 9pro (only one I did this with so cannot attest to other models working). On the one plus turn on mobile Hotspot with open security, in set up screen on galaxy connect to the one us Hotspot, log in to your Google account like normal. Has worked on all the galaxy phones I've tried since I accidentally discovered this last month. Have no explanation as to why this works but it blew my mind
Click to expand...
Click to collapse
Ok. Thank you. I appreciate it. I'll give it a shot if I can find someone with a one 9pro. I've got the One Nord n200 but that doesn't help me much.

Don't take wooden nickels

I'm not accusing the OP or anything nefarious, but imagine this. You use FRP on your device and feel somewhat secure that it at least your phone is stolen, it's useless to the thief. Then all they do is come to XDA and they figure out how to bypass it. I realize there's alway legitimate reasons for needing to bypassing an FRP, but the FRP is there for a very good reason, and defeating it should not be discussed here. Just my two cents.

Mr. Orange 645 said:
I'm not accusing the OP or anything nefarious, but imagine this. You use FRP on your device and feel somewhat secure that it at least your phone is stolen, it's useless to the thief. Then all they do is come to XDA and they figure out how to bypass it. I realize there's alway legitimate reasons for needing to bypassing an FRP, but the FRP is there for a very good reason, and defeating it should not be discussed here. Just my two cents.
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Exactly my point above.

aarontmartin1994 said:
Factory rest, then find someone with a one's 9pro (only one I did this with so cannot attest to other models working). On the one plus turn on mobile Hotspot with open security, in set up screen on galaxy connect to the one us Hotspot, log in to your Google account like normal. Has worked on all the galaxy phones I've tried since I accidentally discovered this last month. Have no explanation as to why this works but it blew my mind
Click to expand...
Click to collapse
That would still need the Google account holder to log in. Which I think is the question being asked; how can I remove this lock without using the Google account linked to the phone.

Sorry. I think you can't do it unless you get the original Google account holder to login (and do a factory reset) . Unless some hackers found a backdoor, otherwise no other way.

Zerobim08 said:
Sorry. I think you can't do it unless you get the original Google account holder to login (and do a factory reset) . Unless some hackers found a backdoor, otherwise no other way.
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There does exist a backdoor but I don't want to be responsible for someone losing their phone which they payed too much for in the first place

If you have a local Samsung Authorized Service Provider location near you, (ex. UBreakIFix or a Samsung Certified Best Buy) they will be able to bypass FRP with a valid Proof of Purchase.
Source: I am a Samsung Authorized Service Provider (SASP) Technician