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[Q] Not Getting Network on a Particular SIM

This is by far the strangest problem I'm facing with my Nexus S
I've two SIM cards from two different networks. one is GSM 900 and anothe is GSM 1800
Both the SIMs are perfectly ok and functioning very well in my Nokia X2.
But one of the SIMs (GSM 900) is not getting any network in my Nexus S.
Interestingly I've been using this very SIM (GSM 900) in my nexus for last one month.
Just to give a background, I'm facing this problem when I flashed the latest 2.3.7 stock ROM.
I tried flashing other ROMs aswell...Currenyly I'm on MIUI...but no Luck ! And Yes, the Other SIM is working absolutely fine with my Nexus and fine with both the ROMS !
Please Help !

If I'm not mistaken I believe 2.3.7 is an update for nexus s 4g models only and not GSM. That is a very good chance as to why your network doesn't work.
Sent from my Nexus S 4G using Tapatalk

drtdiver83 said:
If I'm not mistaken I believe 2.3.7 is an update for nexus s 4g models only and not GSM. That is a very good chance as to why your network doesn't work.
Sent from my Nexus S 4G using Tapatalk
Click to expand...
Click to collapse
But it was Getting network. And My other SIM is getting network in that OS.
BTW, I've flashed a different ROM (MIUI)....No luck with the new ROM...

frequency base band problems perhaps ?

Yes, its Reading 1800 SIMs but not 900 SIMS.

all what you said so far indicates that the problem was caused by the new binary.
it seems the hardware is working fine.
what is the software version of your phone?
download an official version of Nexus S and you'll be fine.
tell me what you see in the "about phone"

Android Version: 2.3.5
Baseband Version: I9020XXKD1

Currently I'm in MIUI. Searching for the official version of 2.3.4

uralpongkhi said:
This is by far the strangest problem I'm facing with my Nexus S
I've two SIM cards from two different networks. one is GSM 900 and anothe is GSM 1800
Both the SIMs are perfectly ok and functioning very well in my Nokia X2.
But one of the SIMs (GSM 900) is not getting any network in my Nexus S.
Interestingly I've been using this very SIM (GSM 900) in my nexus for last one month.
Just to give a background, I'm facing this problem when I flashed the latest 2.3.7 stock ROM.
I tried flashing other ROMs aswell...Currenyly I'm on MIUI...but no Luck ! And Yes, the Other SIM is working absolutely fine with my Nexus and fine with both the ROMS !
Please Help !
Click to expand...
Click to collapse
2.3.7 is for the cdma nexus s 4g not a GSM model. Try reflashing the correct radios for your phone.
Sent from my Nexus S 4G using xda premium

I've tried Flashing Radios. But Yet its the same scenario !
Getting network with a GSM 1800 sim. Not with GSM 900 SIM (Unfortunately this is my official number)
Can anyone suggest the exact stock ROM for my sns. I tried to search here in XDA, but not finding the exact one.
the sticker in back says my SNS model is GT-I9020

Some files may stuck in /system partition when you flash something, and good idea is to format /system from CWM recovery (you can find it under mounts and storage section) and flash rooted flash rom from here - http://forum.xda-developers.com/showthread.php?t=1063664.
It's always a bad thing to flash something that is not meant for your device.
Formating /system before you flash stock rom. Hope that could fix your problem too, but I'm not sure . Just a suggestion ...

Mafia303 said:
all what you said so far indicates that the problem was caused by the new binary.
it seems the hardware is working fine.
what is the software version of your phone?
download an official version of Nexus S and you'll be fine.
tell me what you see in the "about phone"
Click to expand...
Click to collapse
I've flashed this from Google
http://android.clients.google.com/p...206299fe6.signed-soju-ota-121341.da820629.zip
Now my about phone looks like this :
Androd Version : 2.3.6
Baseband: I9020AUCKF1
Build No. GRk39C
Yet, its not getting network.
Should I take it that I've lost my Nexus.

Thanks for you reply Tenhi.
I tried formating Everything ! and also Flashed the Stcok ROM (NSGSM-GRJ22-deodexed-KD1-rooted)
But no Luck.
Interestingly, today I found that the set is getting network in Some places, mostly where the network strength is very strong. And functioning very well with GSM 1900 carriers. But facing the problem with GSM 900 carriers only.
Isn't there anyway to get back to Factory Settings or something like this...?

Don't know what else to say. Apparently the NS4G 2.3.7 ROM changed something permanently, and you can't reverse it with flashing another ROM/Radio/Kernel. Unfortunately I don't have any more suggestions . Hope you will find a way to fix it ...

Yet to get a way to fix it.
Strange problem I'm in.
Now looking for a nandroid backup. (Downloading this http://forum.xda-developers.com/showthread.php?t=1059914)
Lets see whether it solve the problem or not.
At this point I'm loosing hope...
Tenhi said:
Don't know what else to say. Apparently the NS4G 2.3.7 ROM changed something permanently, and you can't reverse it with flashing another ROM/Radio/Kernel. Unfortunately I don't have any more suggestions . Hope you will find a way to fix it ...
Click to expand...
Click to collapse

I had one Stock ROM backup (2.3.3). I flashed it today. Which updated the Radio to KB3 also.
But the problem persisted. Then I took the offcial update to 2.3.4 using the push update.
Yet the problem is not fixed. Not getting any clue on what happened !
I've tried two different operators who run GSM 900 and its not getting network with them.
But There is no problem with GSM 1800 operators. Its running smoothly with GSM 1800 SIM.

Alhamdulillah, the problem has been solved.
A OTA update to 2.3.6 has solved the problem for me.
First I flashed 2.3.3, just after flashing it prompted for a update to 2.3.4 and a day after it prompted for a update to 2.3.6.
Which eventually solved the problem
Thanks for your help guys.

[Q] Best radio version for using oversea ?

Hi,
I am using AT&T Samsung Galaxy S II Skyrocket in Viet Nam, not in USA, because i like the way this Skyrocket phone design so i ask some of my friend bought one for me from US. But i got som problem with this phone when using in my 3G network carrier Mobifone , 3G data connection sometime lost and sometime good . So anyone have exprience with this kind of thing ? What radio version i should use between :
Original Shipped AT&T Skyrocket Radio I727ATTKJ2 and RIL
Original Shipped Rogers I727RUXKJ7 Radio and RIL
AT&T 2.3.6 OTA Update Radio I727ATTKK1 and RIL
T-Mobile T989UVKL1
in this topic : http://forum.xda-developers.com/showthread.php?t=1384865
Best regards,

I've seen about oversea(europe) thread.
Please refer it.
http://forum.xda-developers.com/showthread.php?t=1377114
But I've one question.
Does your Skyrocket gps fix time is fast in your vietnam country?
Normally gps lock time is about 5~10 sec.
because, I will purchase skyrocket, but some of phones are using agps surver using
their own country.(for example, T-mobile G2x using T-mobile a-gps server,
So it will cause gps fix laggy)

Pulverizer said:
I've seen about oversea(europe) thread.
Please refer it.
http://forum.xda-developers.com/showthread.php?t=1377114
But I've one question.
Does your Skyrocket gps fix time is fast in your vietnam country?
Normally gps lock time is about 5~10 sec.
because, I will purchase skyrocket, but some of phones are using agps surver using
their own country.(for example, T-mobile G2x using T-mobile a-gps server,
So it will cause gps fix laggy)
Click to expand...
Click to collapse
thanks you
GPS fix super fast here. If the weather good it make take just a few second. I am trying flash T989 rom to see if anything better.

you're welcome.
I think overseas users make a thread.
Isn't it? hehe
I am very very wodner that compatibility to
AT&T ROM(727) , Rogers ROM(727R), T-mobile ROM(989) all models?
For example, I will use to Odin.
* If I have a i727 ATT Device,
1) flash to i727R ? not bricked?
2) flash to i989 ? not bricked?
If I get a i727 ATT device, I will flash i727 Rogers ROM.
Because AT&T have many pre-load apks. And too many customizing.

Pulverizer said:
you're welcome.
I think overseas users make a thread.
Isn't it? hehe
I am very very wodner that compatibility to
AT&T ROM(727) , Rogers ROM(727R), T-mobile ROM(989) all models?
For example, I will use to Odin.
* If I have a i727 ATT Device,
1) flash to i727R ? not bricked?
2) flash to i989 ? not bricked?
If I get a i727 ATT device, I will flash i727 Rogers ROM.
Because AT&T have many pre-load apks. And too many customizing.
Click to expand...
Click to collapse
Hi. yes. i think we can flash flash those rom to any of those kind of phone because it have same hardware.
I also hate those pre-load apks, i am downding some "nake" rom without any preload apks from t989 phone and flash to my t727 phone. i will let me know the result in nex 40 minute

i flash the Juggernaut rom from T989 from here http://forum.xda-developers.com/showthread.php?t=1322642 but it look like 3G data connection not so good.
I flash to NeXusM0Di727 here : http://forum.xda-developers.com/showthread.php?t=1426590 and so far everything work great. Very good rom

Thanks for very useful information.
I am wondet yet what I buy i727 or t989.
Its very confused hehe...
Sent from my LG-P990 using XDA App

For someone who are using this i727 oversea .
I'v tried all the radio but in the end this radio : T989UVKL1 is the best now . Very strong singal .
Here are download link : http://www.ponack.net/TPC/dagnarf/cwm-tmob-kl1-radio.zip
It make by Da_G

Thanks for very useful information.
I purchased White i727 skyrocket. Its very very beauty!!
I wonder that Can I Flash i727R(Rogers) rom via odin tool?
I try find rogers i727R CWM image(ZIP), but I can't find it.
AT&T stock rom have too many bloat app and Can't use wifi hotspot(its only use AT&T SIM).

ok now i have problem with T989UVKL1 !!! It look like my baseband DEAD !!!! I alway lost signal , can't sms or receive sms , can't call or receive call . I reflash my phone with stock AT&T rom via odin but still no luck . it look like T989UVKL1 radio did something wrong in my phone
HELPPPPPPPPPPPPPP ! ! !

I recommend thay you will make new thread about your baseband problem.
Sent from my LG-P990 using XDA App

[Q] Can I install a custom ROM on a network locked Galaxy S2?

Hi,
simple question I assume but I couldn't find an easy answer with Google:
In my family we have 2 Samsung Galaxy S2 phones, one is unbranded and the other is a locked one from Vodaphone.
On the unbranded one I installed the LiteningRom 3.2 and speedmod K19, all works perfectly and battery life is excellent.
Question is: can I also install this (or any other) custom rom on the Vodaphone branded Galaxy or will it brick the phone/make it unusable ?
Thanks in advance for your views.

Hi,
I'm fairly new to rooting, my galaxy S2 is locked to O2, I managed to root my device with no problems at all using ODIN. Just make sure u download the right rooting package for your firmware.

Yes you can! I've done it! My sg2 running a flawlessly rom now.
Sent from my GT-I9100 using XDA

Thanks for the replies, I will give it a try.

Your phone being network locked, to the best of my knowledge, should have no effect whatsoever.
What you NEED to watch out for is whether or not your provider's network is GSM or CDMA. Don't try to flash a CDMA rom to a GSM phone, or vice versa.
And make sure to Nandroid Backup!(!!)

[Q] Urgent Help Nedded

I have unlocked nexus s i9023. I flashed lot of roms and somehow it stopped working (no signal at all) with some networks. For example when I was india, it wasn't working with any network(they operate at 900 MHz). But when I moved to US and got a net10 sim card, it worked, and with at&t as well (850 MHz I suppose). But now I got tmobile, which I suppose works with 900Mhz, and its not working.
Conclusion: As far as I know mobile nexus s is not working with network operators who use 900 Mhz, and it works only with 850Mhz band only.
If any of you have any idea what could be be wrong and how to fix then please help me.
Thanks in Advance

I9023 works on all 4 bands. So it should work unless there is some problem with radio. I suggest you flash back Googler stock factory images. That would correct any radio issues. There is a thread in general section which explains the steps for flashing factory images.
Sent from my Nexus S

anshumandash said:
I9023 works on all 4 bands. So it should work unless there is some problem with radio. I suggest you flash back Googler stock factory images. That would correct any radio issues. There is a thread in general section which explains the steps for flashing factory images.
Sent from my Nexus S
Click to expand...
Click to collapse
Yeh it was working on all 4 bands before I tried a crappy MIUI rom, but after that it stopped working for few networks who runs on 900 Mhz.
I did everything.... installed factory image from here, and even tried different flashing radios but nothing worked so far

[Q] Help SCH-I535 Venezuela

I recently bought an S3 SCH-I535 Verizon (CDMA) and I managed to run with Phone release Info.apk GSM Global Network a line, what I have now with ICS 4.0.4 and from there I could not update to JB via CWM, there is some JB custom rom or kernel that has the same option to change the overall network? either via Odin or CWM, I tried several and with no option appears. In advance thank you very much![/SIZE] excuse my English:good:

Tutef said:
I recently bought an S3 SCH-I535 Verizon (CDMA) and I managed to run with Phone release Info.apk GSM Global Network a line, what I have now with ICS 4.0.4 and from there I could not update to JB via CWM, there is some JB custom rom or kernel that has the same option to change the overall network? either via Odin or CWM, I tried several and with no option appears. In advance thank you very much![/SIZE] excuse my English:good:
Click to expand...
Click to collapse
Im actually running 4.1.1 with all the mods for GSM and is working, the data speed can't be faster than Edge (E) simple because the Bands are different from LA, the S3 from verizon only have 2100 so we are out f luck for more speed.
But yes even with the stock ROM you can re install everything to make GSM work again.

jmberumenb said:
Im actually running 4.1.1 with all the mods for GSM and is working, the data speed can't be faster than Edge (E) simple because the Bands are different from LA, the S3 from verizon only have 2100 so we are out f luck for more speed.
But yes even with the stock ROM you can re install everything to make GSM work again.
Click to expand...
Click to collapse
Thank you, you will have the link to follow to the letter and to enjoy the 4.1.1? this would help much since there is much information and I want to avoid mixed brick my team