Modem change breaks mobile data. - Galaxy S III Q&A, Help & Troubleshooting

Hey guys, this is my first thread on here so i'll try to be descriptive.
i'm running an i-9300 international in the UK. I recently changed to omega rom and it's been working great but unfortunately my speeds on mobile data are horrendously slow even on H+. my wifi speeds are better than ever so i've surmised it's not connected.
after some research i found out the modem for my network (tmobile) is I9300BVEMF1 i flashed this and afterwards the phone doesn't recognise my sim.
I flashed it back to the previous modem and it works but slowly.
On stock it works much better. Is there anything i can do?

Hi,
We have a sticky thread all about IMEI / EFS issues. This is because if you do a search here now, you'll find literally hundreds of threads all about the same thing.
Please go to:
general > Sticky roll-up thread > "IMEI / EFS - Know this stuff"
... have a read. If you have further questions, please feel free to ask them in that thread. We set it up to try and keep the forum tidy.
Thanks
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Related

samsung galaxy s3 imei lost fix

Hello
Here is a simpe fix for lost imei
Just use odin to flash to xxemg4
I just figured out that the modem in leaked version of 4.2.2 replaces the imei
If you still want to have the new android flash it with mobile odin and deselect modem so the imei wont be replaced with 0049....
Read general > sticky roll-up thread.
All this is covered in the imei thread
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Glad the fix is that simple looks like rootSU has been leading us up the garden path with all these guides .
jje

help with corrupt efs (0049... imei)

my sister flashed a rom on her i9300 and didn't backup the efs folder. and left me with the mess.
i flashed a stock 4.0.4 rom on it but the imei is still 0049....
i tried to fix it on windows xp and w7.
there are a lot of solutions out there but none of them worked for me.
so far i tried:
1) Ariza patch
2) i created a text document using sgs3 nv item generator to use with the different recommended software.
for this to work i had to connect my s3 as a usb com port but that didn't really work because the *#7284# dial command did nothing. i used the SManager to run a script that is supposed to do the same thing. the phone did show up in the device manager, but as a samsung mobile usb modem. using USBDeview i saw that it was listed as port COM9 (COM18 on XP), and most of the guides out there show the connection as COM1.
maybe as a result the following programs that were recommended to change the nv items did not work. maybe it was for different reasons:
-Maui META 3g V6 - could not connect to phone. it only offered to connect to COM8 which was also listed as samsung mobile usb modem but was shown in USBDeview as inactive whereas the COM9 was active.
-NV items reader/writer - i picked the samsung mobile usb modem port (COM18) and connected to it, but once i tried to read or write the program would reply "failed... phone does not answer"
-CdmaDevTerm v.2 - couldn't understand how to work it and found no guides. i fiddles around trying to write an IMEI # but it kept getting stuck.
-cdma workshop 2.7 - managed to connect to the port but when i clicked the read button it replied "failed... phone does not answer" and i didn't get the phone's info. it still gave me this information:
first nv item:0
last nv item: 3994
-qpst - i couldn't even pick the port i wanted. only COM1, which was no help.
anyone has an idea what i did wrong?
thanks,
shahar.
Look at the imei thread in general > sticky roll-up. Please don't post duplicate threads. 10 times a day this is posted.
Ariza patch isn't even ANYTHING to do with this. Suggest you stop and read before you brick your device with multiple solutions.
Qpst - not for this phone
Cdma - not this phone
Imei can be fixed in mobile phone shop for £20. Please read the existing thread.
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thanks. i did try to read as much as i could before asking.
i read the imei thread, though i didn't understand a lot.
are you sure qpst doesn't work? this guy gave me the wrong impression then - {www} youtube(dot)com/watch?v=_d2Nsb23ycw[/url]
so no help here, huh?...
rootSU said:
Look at the imei thread in general > sticky roll-up. Please don't post duplicate threads. 10 times a day this is posted.
Ariza patch isn't even ANYTHING to do with this. Suggest you stop and read before you brick your device with multiple solutions.
Qpst - not for this phone
Cdma - not this phone
Imei can be fixed in mobile phone shop for £20. Please read the existing thread.
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Click to expand...
Click to collapse
Qpst is not for the i9300. It doesn't have anything qualcomm related inside. There are many other versions of the s3 that do. Just not ours.
Flash latest rom mg4 or later to ensure you can read efs v2. If that fails send for repair. These are not new answers. Reading is understanding. Following videos on youtube is blindly jumping off a cliff. Read the sticky threads (as I suggest) and if you don't understand anything in a particular thread ASK in that thread.
All the answers are in that thread. There are no other answers. Read. Learn. Understand. Stay away from YouTube. This is my advice to you
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thanks for the advice
rootSU said:
Qpst is not for the i9300. It doesn't have anything qualcomm related inside. There are many other versions of the s3 that do. Just not ours.
Flash latest rom mg4 or later to ensure you can read efs v2. If that fails send for repair. These are not new answers. Reading is understanding. Following videos on youtube is blindly jumping off a cliff. Read the sticky threads (as I suggest) and if you don't understand anything in a particular thread ASK in that thread.
All the answers are in that thread. There are no other answers. Read. Learn. Understand. Stay away from YouTube. This is my advice to you
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Click to expand...
Click to collapse
No problem. Just to be clear, never follow advice for other models of the s3. Only specifically the i9300. All the other models are completely different and advice from those phones may brick yours
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[Q] please ..... help not registered on network problem

i have galaxy S3 ... i upgraded it from 4.1.2 to 4.2.2 jellybean I9300XXUFME3_I9300OJKFME1_ILO .... everything went good until i tried to make calls ..... (( not registered on network )) problem appeared ...
please any help ....
and what about modem_XXDME4 ? is this fix it ?
thank you
livefree159 said:
i have galaxy S3 ... i upgraded it from 4.1.2 to 4.2.2 jellybean I9300XXUFME3_I9300OJKFME1_ILO .... everything went good until i tried to make calls ..... (( not registered on network )) problem appeared ...
please any help ....
and what about modem_XXDME4 ? is this fix it ?
thank you
Click to expand...
Click to collapse
Go to general forum, stickies. Read about 'EFS know this stuff.'
Hi,
We have a sticky thread all about IMEI / EFS issues. This is because if you do a search here now, you'll find literally hundreds of threads all about the same thing.
Please go to:
general > Sticky roll-up thread > "IMEI / EFS - Know this stuff"
... have a read. If you have further questions, please feel free to ask them in that thread. We set it up to try and keep the forum tidy.
Thanks
-----------------------
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I do NOT reply to support queries over PM. Please keep support queries to the Q&A section, so that others may benefit
Please use the search tool before creating a new thread. Posting a thread on a topic that has been covered over and over is troll heaven. You will get eaten alive out here for such a thing.
Thread closed

[Q] Help me imei null/null baseband unknown

Good morning friends xda this day so I would ask URGENT help with a SG-i9300 S3 recently I have the phone and it was all fancy and was even Staba root a stock rom and root ps had my programs including root browser and then last night I got to make a copy of my efs folder and ps I saw that I could not because then there m failure insisted he left after me any minute network logo appeared locked and as I gave you * # 06 # and I get imei NULL / NULL baseband unknown then I get in because I read in several forums where flash was saying that making him with the original firm then I would stay again via odin intale I9300UBEMH2_I9300UVOEMH1_ARO and followed the same ... please help you? and look in the forums and had one of how to retrieve the IMEI in 9 steps and did not work l'm really desperate and scared ..:crying::crying:
please help meeee
Hi,
We have a sticky thread all about IMEI / EFS issues. This is because if you do a search here now, you'll find literally hundreds of threads all about the same thing.
Please go to:
general > Sticky roll-up thread > "IMEI / EFS - Know this stuff"
... have a read. If you have further questions, please feel free to ask them in that thread. We set it up to try and keep the forum tidy.
Thanks
Ps please be careful where you post questions. They should go in q&a. General is not for questions
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[Q] No network problem from Omega rom V49 (JB 4,1,2) to Omega rom V46.1 (JB 4.2.2

I have a problem after flashing my SG3 GT-i9300
from Omega rom V49 to V46.1 i do not get any network reception at all but if i flash back to Omega v49 i get back network reception.
Any suggestions to how to make the reception also work in Omega v46.1?
In v49 the phone have the correct emei but with v46.1 i get 0049990 as emei number.
thanks in advance
After flash omega46..reboot in recovery and flash xxemg4
http://d-h.st/U2m
Sent from my GT-I9300 using xda app-developers app
Hi,
We have a sticky thread all about IMEI / EFS issues. This is because if you do a search here now, you'll find literally hundreds of threads all about the same thing.
Please go to:
general > Sticky roll-up thread > "IMEI / EFS - Know this stuff"
... have a read. If you have further questions, please feel free to ask them in that thread. We set it up to try and keep the forum tidy.
Thanks
-----------------------
Sent via tapatalk.
I do NOT reply to support queries over PM. Please keep support queries to the Q&A section, so that others may benefit

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