Samsung Galaxy S3 Stuck on BootScreen - Android Q&A, Help & Troubleshooting

I posted my problem on androidcentral earlier today, I'm not progressing anywhere with my situation, I've copied my original posts with some edits here. If you need more information for helping me to resolve this dilemma, ask right away.
I'm in deep****. It started when i tried changing the fonts on my galaxy s3, simple install and reboot. Now when it rebooted it got stuck on the Metro PCS logo screen, I turned it off and turned it on again, and same problem. Then I tried flashing my g3 with odin it said pass, but now my model number has disappeared from the samsung boot screen and it still has the same problem prior; before it said Samsung Galaxy S3 SGH-T999N, but now it just shows Samsung Galaxy S3. Prior to all this my phone was already rooted. I'm a noob and I need help. All the details I remember about my phone is that the carrier is Metro PCS, the model is SGH-T999N (a t-mobile variant) and the OS was Jellybean 4.1.2.
Thankyou for reading, please reply soon its urgent.
*Extra notes, I tried booting it up into recovery mode it shows splash screen for a brief moment and then completely turns off. It is still able to go in to download mode, also when the phone is completely off and charged in, the battery charging animation is still normal/unchanged before all this happened.
*Additional notes, when in download mode the information at the top left corner reads as:
ODIN MODE
PRODUCT NAME: SGH-T999N
CUSTOM BINARY DOWNLOAD: Yes (3 counts)
CUSTOM BINARY: Custom
SYSTEM STATUS: Custom
QUALCOMM SECUREBOOT: ENABLE
tookutz said:
It failed to flash, I tried 3 times, here is the log of the 3rd/last attempt with that .tar file.
<ID:0/009> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> T999UVDLJA_T999TMBDLJA_T999UVDLJA_HOME.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/009> Odin v.3 engine (ID:9)..
<ID:0/009> File analysis..
<ID:0/009> SetupConnection..
<ID:0/009> Initialzation..
<ID:0/009> Get PIT for mapping..
<ID:0/009> Firmware update start..
<ID:0/009> aboot.mbn
<ID:0/009> NAND Write Start!!
<ID:0/009>
<ID:0/009> Complete(Write) operation failed.
<ID:0/009> Added!!
<OSM> All threads completed. (succeed 0 / failed 1)
What else can I try? I doubt I'll be able to replace it with the warranty by now.
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tookutz said:
Isn't that only on verizon's variants? I don't remember anything having to do with the bootloader, but I did successfully root my phone, so maybe I did, I'm not completely sure.
*Edit, Could you also give me a detailed guide as to how I could reset it with Kies? I'm not sure if it will work or not, because in my first postt, if it wasn't clear, I think I used the wrong .tar which made the model number under the samsung boot screen, disappear.
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Click to collapse
tookutz said:
I'm still stuck on the KIES method, I removed my sd card and found that my titaniumbackup update.zip, also I found the folder where my KIES backup files are that I made on kies a few days ago. Please continue helping me.
*Edit, okay I found my IMEI through the google dashboard, it was also the same number on the sticker under the battery. FML. Okay so when doing the Kies method it asks me for the model name, I enter SGH-T999N, now it prompts to ask me for the s/n, I copy and paste in the IMEI, but it says that it is incorrect. PLEASE HELP
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tookutz said:
I posted my problem on androidcentral earlier today, I'm not progressing anywhere with my situation, I've copied my original posts with some edits here. If you need more information for helping me to resolve this dilemma, ask right away.
Click to expand...
Click to collapse
You should use this forum
If you try KIES recovery try to follow this
you should try use this tool kit
Check this out! You , YES! you are an " Android ". Not your phone but U.
You Must watch this documentary concerning your privacy Terms & Conditions we had agreed to, by using a PC or Smartphone
How to say Thank you? If you find any post helpful on XDA, click on their Thanks button
{
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"lightbox_start_slideshow": "Start slideshow",
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"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
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If you are using XDA App or Tapatalk, long press on the post and select :good: Thanks Its easier to give "Feedback" in this manner than make an additional post.​

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xsenman said:
You should use this forum
If you try KIES recovery try to follow this
you should try use this tool kit
Check this out! You , YES! you are an " Android ". Not your phone but U.
You Must watch this documentary concerning your privacy Terms & Conditions we had agreed to, by using a PC or Smartphone
How to say Thank you? If you find any post helpful on XDA, click on their Thanks button
If you are using XDA App or Tapatalk, long press on the post and select :good: Thanks Its easier to give "Feedback" in this manner than make an additional post.​
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Thankyou for being the first person on here to reply and linking me to a very helpful thread, but I'm a noob can you please tell me what I'm exactly suppose to do? Like do i re-flash it to a stock version? I'm very new to this and I don't exactly know what all the terms mean yet.

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tookutz said:
Thankyou for being the first person on here to reply and linking me to a very helpful thread, but I'm a noob can you please tell me what I'm exactly suppose to do? Like do i re-flash it to a stock version? I'm very new to this and I don't exactly know what all the terms mean yet.
Click to expand...
Click to collapse
you should first try the KIES method. following the guide, since you have mentioned it earlier, if that fails
Than you need to locate the original Stock ROM for SGH T999N to flash using Odin3 version 3.04 and up ( sometimes if you use wrong version or a poor USB connection ( wrong USB cable) , you could end-up with problem you had posted), as others meant for variants may not be compatible with yours that why its important you seek help in the S3 forum, for someone may have the same unit you have and may know where you can download it. You can Post in that forum, for help or search that forum for relevant info regarding your particular variant.
EDIT: you can down load the ROM http://www.samfirmware.com/
Country/Carrier Date Version
USA (T-Mobile) 2013 April 4.1.2 T999UVDMD5 Latest
USA (T-Mobile) 2013 January 4.1.1 T999UVDLJC
USA (T-Mobile) 2012 October 4.1.1 T999UVDLJA
USA (T-Mobile) 2012 October 4.0.4 T999UVALJ4
USA (T-Mobile) 2012 August 4.0.4 T999UVALH2
USA (T-Mobile) 2012 May 4.0.4 T999UVALEM oldest
Most of all Charge your phone fully, before attempting to Flash
The tool kit has guides that can help you download that ROM, so read it thoroughly as to how to use it.
Check this out! You , YES! you are an " Android ". Not your phone but U.
You Must watch this documentary concerning your privacy Terms & Conditions we had agreed to, by using a PC or Smartphone
How to say Thank you? If you find any post helpful on XDA, click on their Thanks button
If you are using XDA App or Tapatalk, long press on the post and select :good: Thanks Its easier to give "Feedback" in this manner than make an additional post.​

---

xsenman said:
you should first try the KIES method. following the guide, since you have mentioned it earlier, if that fails
Than you need to locate the original Stock ROM for SGH T999N to flash using Odin3 version 3.04 and up ( sometimes if you use wrong version or a poor USB connection ( wrong USB cable) , you could end-up with problem you had posted), as others meant for variants may not be compatible with yours that why its important you seek help in the S3 forum, for someone may have the same unit you have and may know where you can download it. You can Post in that forum, for help or search that forum for relevant info regarding your particular variant.
EDIT: you can down load the ROM http://www.samfirmware.com/
Country/Carrier Date Version
USA (T-Mobile) 2013 April 4.1.2 T999UVDMD5 Latest
USA (T-Mobile) 2013 January 4.1.1 T999UVDLJC
USA (T-Mobile) 2012 October 4.1.1 T999UVDLJA
USA (T-Mobile) 2012 October 4.0.4 T999UVALJ4
USA (T-Mobile) 2012 August 4.0.4 T999UVALH2
USA (T-Mobile) 2012 May 4.0.4 T999UVALEM oldest
Most of all Charge your phone fully, before attempting to Flash
The tool kit has guides that can help you download that ROM, so read it thoroughly as to how to use it.
Check this out! You , YES! you are an " Android ". Not your phone but U.
You Must watch this documentary concerning your privacy Terms & Conditions we had agreed to, by using a PC or Smartphone
How to say Thank you? If you find any post helpful on XDA, click on their Thanks button
If you are using XDA App or Tapatalk, long press on the post and select :good: Thanks Its easier to give "Feedback" in this manner than make an additional post.​
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Click to collapse
Thankyou again, I'll post there and see if anyone else has had the same problem.