Galaxy s3 T-mobile no 3G network - Galaxy S III Q&A, Help & Troubleshooting

hi everyone ,
1- im not in USA , but my phone model name is SGH-T999 , (when i bought my phone i didn't know that it is a T-mobile version !)
2- my issue is that my phone not connecting to 3G , even that there is an option for 3G in the settings but when i choose it the network become unavailable .
3- i tried wipe data and wipe cache , still cannot connect to 3G , only EDGE ! ( E sign )
4- I tried to install like 4 official ROM using Odin , but any of them didn't work , always received a FAILED message on Odin and "unsupported dev_type" on my phone
5- then my phone didn't turn on , ( i didnt know what to do cz i cant fix it using Odin !
6- Suddenly I noticed that my model Name is NOT GT-I9300 , but It is SGH-T999 ( i figured that in the CWM recovery menu )
7- Here i noticed that I DON"T have the "world model" of Galaxy S3 ,but it is the T-mobile version , so here i immediately installed the T-mobile stock ROM , and it worked using Odin and my phone got back to life
8- Now i just want ur help plz to make my phone connect to 3G Network
can I install the "world model" ROM for ex the UK ROM or middle east ROM ?
if yes, will it fix my problem ? if not how to fix my problem
thank a lot

T999 is a completely different device from the I930x line, based on a dual-core Qualcomm SoC (instead of the quad-core Exynos found in the international models). Go to the US/Canadian Galaxy S3 forum for support.
IIRC the T999 is lacking support for some or all European 3G bands, which is why you are not seeing a 3G signal with it.
Sent from my GT-I9305 using XDA Free mobile app

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[Q] 3g dongle problem for karbonn st8 tab

few days back i brought a new karbonn Smart Tab 8 Velox its dosent work with vodafone 3g data card (im located in india ) is there any way to change firmware or software for to work with vodafone
tab.kella said:
few days back i brought a new karbonn Smart Tab 8 Velox its dosent work with vodafone 3g data card (im located in india ) is there any way to change firmware or software for to work with vodafone
Click to expand...
Click to collapse
check the karbonn website or go to flipkart.com they writen wich 3g data card are supported
hey guyssss
thank you all
Use PPP widget app in play store
Sent from my ST8 using Tapatalk 2

[Q]heipl me (NETWORK NOT AVAILABLE)

HI,
I have Samsung galaxy ace gt s 5830 i.Early i have bricked it but now i have un-bricked it by flashing it with stock firmware .every thing work good but when i make call "mobile network not available" message will show .then i put SIM of other mobile carrier (like zong )it work
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::::::::::::::::::::::::::::::::::::::::: SO KINDLY HELP ME:::::::::::::::::::::::::::::::::::::​
why made two different threads for same problem ?
http://forum.xda-developers.com/showthread.php?t=2328968

[Q] GOING NUTS !!!! which firmware please !!

hi
NEED HELP please...... SORRY for the long message but just wanna make sure ...
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Galaxy Note 3(SM-N900) Official Rom download(lollipop5.0) @ Service centre

Hey friends myself Jaberjeet Singh. Basically m not a developer but still i tries to perform experiments on my phone sometimes.I have Galaxy Note 3(SM-N900) - the international variant of Galaxy Note 3 and i believe many times while experiments the software of my phone or apps got crashed after the root or after installing a custom rom a no. of debugs are there so i suggest u should have the official ROM of this variant if your going to continue.. with it.So here's the fully official ROM/FIRMWARE straight from the samsung service centre , i just got it and i am sharing it with all of you. I own tried very much to find it over the internet but didn't find it and now i have the thing i need very much before so every one another which needs it could get it here on this thread.
REASONS WHY TO USE IT :
(1) If your phone is soft bricked or fully bricked doesn't matter its the rom from service centre and definately going to resolve your issue.
(2)If you are a developer and try making your phone installing some recoveries,boot animations,custom roms etc... you should have this rom so that in the case you are able to revert your phone to as it was a new one....
(3)It includes Bootloader file also that i definately did not find on the others f.... roms from the internet .It means if your device freezes at the satrtup showing "samsung" animation and doesnot respond further again my files are going to help you.....
WARNING :- These files are only for international variant of GALAXY NOTE 3(SM-N900)
So,please don't try to flash these files any another variant .
The variants it DONOT supports are listed below.
SM-N9002 Dual Sim variant for Chinese Market
SM-N9005 LTE variant
SM-N900K for KT Telecom South Korea
SM-N900L for LGU+ South Korea
SM-N900S for SK Telecom South Korea
SM-N900W8 - Canadian
SM-N9000Q Turkish
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SM-N900P for Sprint United States
SM-N900T for T-Mobile USA
SM-N900V for Verizon Wireless
All of these are Galaxy Note 3 variants world wide in various countries . U must not Use these firmware files on these variants its all UR RESPONSIBILITY.
INFORMATION ABOUT THE FILES
CSC_ODD_N900ODDEBOB2_CL4278891_QB4154091_REV00_user_low_ship.tar
CP_N900DDUEBOB1_REV01_CL1838651_SIGNED.tar
BL_N900XXUEBOD1_CL4115321_QB4622537_REV00_user_low_ship.tar
AP_N900XXUEBOD1_CL4115321_QB4622537_REV00_user_low_ship.tar
Odin3_v3_09.zip
HA3G_EUR_OPEN_32G.pit
>>>>>>>>>>>>>>>>>>>>>>Replace the dollar sign($) by ( . ) in links to make them working.<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Download link - 4shared$com/office/MxDAsFvCce/link$html
INSTRUCTIONS
(1) Install Samsung Drivers first or you could download them here developer$samsung$com /technical-doc/view$do?v=T000000117
(2)Now download winrar according to ur windows (32/64)bit if you dont have download it from here - www$rarlab$com/download$htm
(3)If you really have brain u should downloaded the file(SM-N900.rar) from mega site . U need winrar to extract it in your windows machine.Now extract the rar file to your desktop.
(4)After extraction you will find a folder named SM-N900 now open that folder and run "Odin3 v3.09.3.exe" as administrator .
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(7)When you connect your phone in download mode with your machine the com:4 port should turn blue if it doesnot simply install samsung kies from its official site
and then try again. if you dont know how to boot into download mode see here - www$android$gs/enter-galaxy-note-3-download-mode
(8)After adding all the files and maintaining the ticks acc. to my description click on start and wait untils your odin shows pass in green colour.If it does not CONGO your phone is done go to service centre to replace your PCB (printed circuit board) it will be replace free of cost if your phone is under warranty.
email me if xda remove the link or any another url error on [email protected] . I will send the file link to you personaly.
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S6 Edge SM-G925F , Abnormal Behavior

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Q1. is this a reconditioned phone that was previously some carrier phone that they converted it to G925F ?
Q2. Do locks (network , carrier , baseband , etc) exist for G925F which would produce GSM issues ? like i had ? sim works but fails to register on gsm network
I will be glad if anyone could help me out! (P.S IMEI remained intact , didnt get corrupt, despite no network capability , and i checked , in my country it isnt flagged stolen or etc)
dukesx said:
Hey Guys , I recently purchased an S6 edge G925F from my local market , in used condition , it came with Android 5.1 Lolipop but when i upgraded it to marshmallow , its GSM capability stopped , which means that it detected my local network but failed to register on my sim network , it would say " could not connect , try later" , G925F roms work completely except sim communication , and when i had this issue , i took it to my seller to repair it , and he refreshed it to lollipop again and said that dont upgrade to marshmallow , because it has GSM bugs etc , and i asked him about what happened and asked that whether it was locked or etc , he answered that my phone got locked (i dont know if its carrier or bootloader or baseband lock) but he said it got locked due to baseband change , My questions are :
Q1. is this a reconditioned phone that was previously some carrier phone that they converted it to G925F ?
Q2. Do locks (network , carrier , baseband , etc) exist for G925F which would produce GSM issues ? like i had ? sim works but fails to register on gsm network
I will be glad if anyone could help me out! (P.S IMEI remained intact , didnt get corrupt, despite no network capability , and i checked , in my country it isnt flagged stolen or etc)
Click to expand...
Click to collapse
My answer is yes sm-925f can get locked to carrier
@osman34 So samsung tool by Z3X can unlock the GSM lock on it it i upgrade to marshmallow ?
havent tryed it yet
@osman34 any solution to SIM registration issue on marshmallow (sim doesnt register on network) ? i am stuck on lollipop -__- and the firmware is of UAE , constant app crashes and i am sick !
dukesx said:
@osman34 any solution to SIM registration issue on marshmallow (sim doesnt register on network) ? i am stuck on lollipop -__- and the firmware is of UAE , constant app crashes and i am sick !
Click to expand...
Click to collapse
theres no any working solution yet i think u r stucked with LP

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