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[Q] No signal or No service on Samsung Galaxy S

I noticed that my galaxy was sluggish & decided to preform the solution here: hemorrdroids.net, speed up your Samsung galaxy S
now in the process, i got it wrong several times whiles flashing with the odin. when I finally got it right and reinstalled the firmware, the phone displays a no service notification, but show the name of the network chip in it. no signal bars as if it were locked. I bought it as unlocked phone. now I cant even search for a single network in my country. when u do a manual search, it returns nothing. if u try the dialer it says not registered to network..
does anyone know how to get my signal a GPS working?? please!!!!!!!!!!!!!

Hmm... I've got the same problem as you... Flashed docs to my Galaxy S Yesterday and now it show no service notification.... Anyone who have a got an idea?

I am also facing the same problem. Any one who has solved it ?

Got the same problem, from 1 day i have notification (no service)

Got the same problem plz plz some one helpp

Not sure if it's the same problem you folks are having, but there's a thread on here entitled "Problem with Airplane Mode on Epic after installing midNight ROM" that describes a problem with no signal after a ROM flash, and a solution via using Odin to update just the modem.
I would post a link, but the forum here won't let me because I don't have enough posts. Your mileage may vary, but the symptoms sound similar so it might give you a place to start even if the fix doesn't fix you.

I too am having the same problem. It seems that my Phone (Galaxy SC-02b) does not recognize the modem/internal antena.
I installed the Darky's Rom on it, and it runs great. Except the signal part. I can flash it back to the original, but I want to see if I can make it work.
I think it's just a matter of picking out the correct modem tar, but I can't find the right one. My phone is a little bit odd, It's a Japanese Galaxy, so not sure if I can find it here. Unfortunately my Japanese is not good enough to go scouring the japanese forums.
Thanks for any help.

Hey Yefimenko what 3G bands are used in Japan 1900/850 or maybe 900/2100 or 1700/2100 ? Can you find that out ? then you need to flash modem that supports that , Europe support 900/2100 US/Canada/Australia 850/1900 and AWS 1700/2100 Tmobile US /Wind? mobilicity Canada
Hitec

We've been through all of this before the Japanese phones will only work with the Japanese kernel. Symptoms are usually sin not recognized and no radio signal. QUOTE=yefymenko;11612862]I too am having the same problem. It seems that my Phone (Galaxy SC-02b) does not recognize the modem/internal antena.
I installed the Darky's Rom on it, and it runs great. Except the signal part. I can flash it back to the original, but I want to see if I can make it work.
I think it's just a matter of picking out the correct modem tar, but I can't find the right one. My phone is a little bit odd, It's a Japanese Galaxy, so not sure if I can find it here. Unfortunately my Japanese is not good enough to go scouring the japanese forums.
Thanks for any help.[/QUOTE]
Sent from my SC-02B using XDA Premium App

Either the phone.apk is bad or the modem is incompatible.
You could try the http://romkitchen.org/ and make an update with different modem only.

If your Samsung Galaxy S displays no network/no signal, or emergency calls only, try the following things:
1. flash the device again with the modem image (download the firmware of your device from samfirmwares.com, delete everything from the .tar file except modem.bin, and then flash this file to the phone with Odin (you can get Odin and instructions from that site too)
2. maybe your nv_data.bin file or /efs directory got corrupted, make a backup of the folder, then simply delete nv_data.bin, it will be recreated for you on Galaxy S.
For this, you’ll need root. If you have a root-enabled kernel, like the Voodoo lagfix kernel, you only have to install the Superuser app and Busybox on the phone, download the Android SDK to your PC, install platform-tools in the SDK manager, go to the platform-tools directory and start adb shell.
In the shell, type su, wait for the Superuser prompt to appear on the phone (if it does not appear, open the Superuser app and try executing su again), enable root access for the command. Now go to /efs, copy everything to for example /sdcard/efs, then rm nv_data.bin.
Reflashing the device with a kernel and checking “phone EFS clear” in Odin also works (make sure you made a backup of the EFS folder just in case).
3. you can try changing the CSC (to XEO for Europe): enter *#272*imei# on the phone tab. Note: this will reset your phone to factory settings, so make sure you did a clockworkmod backup before this. Incorrect CSC setting may cause MMS not working also.
4. check if you inserted the SIM card correctly
Thanks
MertBaBaaa

first check imei no

hello for all members,
i have solution for this problem "not network or not signal" Samsng Galaxy SC-02B Docomo
later write my solution phone work all World
__________
XcachorroX

galaksy s no signal
3. you can try changing the CSC (to XEO for Europe): enter *#272*imei# on the phone tab. Note: this will reset your phone to factory settings, so make sure you did a clockworkmod backup before this. Incorrect CSC setting may cause MMS not working also.
this solution works for me and thanks alot many many thanks

maybe i've got a solution for the no service probleme. i tried this code *2767*3855# and my phone works normal now
i hope it works for you guys

No Network after change of CSC - is there a recovery strategy?
SOLVED
======
Asked around and it goes like this: 2.1 + market = no signal, (2.2 or 2.3) + market = no problem
Solution is UPGRADE from 2.1. to 2.2 or better - I hope this will help anyone else with the same problem.
If you can't do it yourself, any mobile shop will for a small fee.
Symptoms
========
Changed CSC from KSA to XSG with code *#272*HHMM# for 2.1 (no Market in KSA mode)
Galaxy S GT-I9000 now shows blue circle with diagonal in notification area at top of screen.
Settings > Wireless and network > Mobile networks Network mode > Network operators > Search Networks or Select Automatically produces no response - finds no networks.
Dialpad dial a number => "Not registered on network"
Coincidental hardware failure seems very unlikely but not impossible I suppose.
What I would like to know is if there is a recovery strategy from here?
Even if it includes installing a complete new firmware? (and possibility to revert to original if required for warranty)
Device does not respond to "3-finger salute" (volume-home-power).
I am not confident that a warranty is worth all that much in this part of the world. It may be quicker and more effective to do it myself.
Further details of history and phone info below.
I will be very grateful if anyone can help me out
History
=======
Phone purchased in Saudi Arabia (KSA). Worked fine with pre-paid SIM (mobily) voice, data, sms, wifi.
Phone also worked fine with a pre-paid sim (cosmote whatsup) in Greece - voice, data, sms, wifi.
However, since phone was purchased in KSA, Android Market was not installed. Found a Market.apk and installed that. Installs but doesn't actually work.
Found code for changing CSC (*#272*HHMM# for 2.1, *#272*[IMEI No]# for 2.2) 2 colleagues had success and no problems with this with a Tab and 2 Ss, albeit with 2.2. The code looks worth a try on 2.1 so I gave it a go.
Had to remove the side-loaded Market before the code would run and changed the CSC from KSA to XSG.
Market pops up on the screen and works fine.
BUT no network. Network name shows in the Notifications though. The GR SIM shows "(No Service)"
Factory reset, returning CSC to KSA do not help.
The mobily SIM works fine in other phones but no known good SIM works in this phone.
Mobily tech support (in store visit, usually commpetent guy who knows me) is completely flummoxed and asks me if I have a warranty.
So now I have a very compact WiFi only tablet
Phone Info
==========
Model number: GT-I9000
Firmware version: 2.1-update1
Baseband version: I9000JXJG2
Kernel version: 2.6.29 [email protected] #2
Build number: ECLAIR.JPJG8
Personalisatiob(sic) Status
Network Lock
[OFF]
Network Subset Lock
[OFF]
SP Lock
[OFF]
CP Lock
[OFF]
Settings > Wireless and network > Mobile networks Network mode > GSM/WCDMA (auto mode)

Solution to your problem
Hi All,
This happened to me before and I was as frustrated as you and when I was about to give up, I tried one last restoration, but only this time I did it correctly. After that, I restored 5 different versions of Samsung Galaxy S stock ROM back to my Samsung Galaxy S. One of these versions were Chinese, and everything was in Chinese.
Samsung Galaxy S had no signal was because the modem file was missing while you were performing the restoration.
Now, all you have to do is go to this page and follow the instructions to restore the Stock ROM back to your Samsung Galaxy S.

same problems
Hi guys, I have same problem. But a litle diffirent.
When I use 2.3.6 firmware version it's work well no problem. But when I use 4.x.x Rom it says no network and no imei. If I use 4.x.x om pluged the charge my device ,I see gsm company and imei number. It's very interesting. I think , electricty not enough for my device. Maybe Its hardware problems. I 'dont any idea.
How can I solve this problem?
Thanks.

[Q] S4 clone mt6577

Hi,
I humbly ask for assistance on my issue.
To begin with I swapped my iphone5 for an s4 to join the android os, and sad to say the s4 provided was a clone.
Reality bites and I cannot undo the epic fail that has happened. So now I am trying to use this s4 clone.
Details:
- all the features of the s4 clone works okay when I got it, sim is being read and able to make calls and sms.
- it had a theme selector icon button, wherein if you click it, it allows you to select different themes to select and apply.
- i think it is rooted from the start
Problem started as follows:
- being the new user I applied factory reset on the phone via: settings-accounts-backup and reset-factory data reset(selected erase phone storage)-reset phone.
-phone reset did happen but problem is when phone restarted: the sim card is not being read by the phone, (sim management option is greyed out(via setting-mydevice)
-basically the phone is not reading the sim card
-tried changing sim card, I even brought the phone to a repairshop but told me they cant fix it because its a clone, but was advised it was not a hardware issue.
-repairman said the phone should be re-programmed, was advised that the sim card reader software probably got erased when the phone was factory reset.
-repairman also checked the IMEI and said that IMEI is okay (no problem)
-there is no problem with my sim since it works on my nokia phone.
Phone details:
Single sim (micro sim)
Mediatek mt6577 x2 1.001ghz (as per cpu identifier)
Hdc i9500 galaxy s4 layout (as per cpu identifier)
512mb ram
Powervr sgx 531 single core gpu
4.2.2 jellybean
Kernel compiled on 'root' workstation by user: rooter (build: eng.rooter.1371715303)
Linux version 3.4.0 ([email protected]) (gcc version 4.6.x-google 20120106 (prerelease) (gcc)) #1 smp preempt thu jun 20 16:01:33 cst 2013
Wifi works
Compass works
Air gesture works only on home screen and apps screen
Please help me..I really want to enjoy the android os, I cannot get a real s4 now, given I wasted my iphone5 for a knockoff.
Hopefully someone can help me on how this s4 clone can read the sim again.
If you need any additional info for my device please tell me so I can help.

S4 clone
Please help.l

I have this phone and have not used this setting yet. I have a backup of my original so if something like this were to happen, I can just use that and get back to where I was.
Essentially, I think that you may have lost your root (or something) with the factory reset... Check if you are still rooted by downloading Root Checker by Joey Krim. It's free, and will tell you if you are rooted or not. If you aren't, then maybe the root is what made sure the sim card was readable...
Now, if you don't have a root, you can follow the instructions on this page: http://semayi.blogspot.com/2013/03/mxnec-m307-mt6577-rooting-and-back-up.html
For our phones, if it is "stock", the phone will read as rooted according to Root Checker. However, if you use the program stated in the article it will show a yellow box in the lower-right corner if rooted. The article states that box should be green if fully rooted. I also saw the Backup button grayed out because of this... I hit the "Root" button, and it fully rooted the phone after several minutes (maybe 10 or so). This allowed me to create a full backup of my phone (as well as create a custom recovery from a copy of that backup).
If you're still having issues, tell me any other things you've tried or any other details and we'll go from there.

samsung S4 clone problem
well i read your post and i have 2 phones with same situation as yours and phone is full functionally but no network and seen "emergency only "
so its clear its sim is not read or some problem with reading to sim ....
so if anyone have some idea to solve this issue please help us..........
thanks a lot......

basically, you need to re-write the IMEI's (should be behind the backcover under the battery) into your NVRAM. there are basically 2 ways of doing this:
generating the IMEI file manually or using MAUI META 3G, SN Write Tool or MTK Droid tools. the first 2 methods will hardwrite them to your device, so if you want to wipe again everything will work fine from start. last one will softwrite them and they got wiped again after a factory reset. for now, just download Droid tools, klick on imei something and enter your imeis. (device needs to be in debugging mode, check your settings for that)

Im having a similar problem can anyone help
Hi All,
Im experiencing the same issue as the original poster.. after lots of searching in a relieved to have found this thread. My Galaxy S4 Spark is showing "no sim card detected"..
Having checked my Imei number and it is different from that on the back sticker. I have tried using MTK Tools to change it to the original one which is 3573********29 every thing looks to be successful but when i reboot and check the imei using *(Hash)06(hash) it show my imei as 3573********28/01..
I have also tried changing it using the mobile uncle app with the same result.. Needless to say my phone is showing no sim.
IS this normal or should the IMEI be showing as exactly the same as on the sticker.
Thanks in advanced,
Jonathan.

what phone did i buy?
Hello guys,
A few weeks ago i bought a samsung s4 clone 1:1 copy.Last days ive been reading allot on the forums but as a noob i cant see the trees through the wood ...im stuck... i did manage to root my divice but only after trying 10 -20 times.I used mtk droid tools.
My question is if anyone can tell me if there are other roms for this Phone and what Phone did i buy.
I hope someone can help me out. thanks .

MT6577 DualCore 2x1 Ghz, Android ICS 4.0 (4.2.2 is fake), Kernel Version 3.0.13. Device maybe can identified as mtk77_cu_ics2, but there are maybe few other builds out there using this name. i would higly recommend to store your backup on a safe place, if you lose it while playing around with ROMs device may be bricked forever. i cannot link you to another ROM - you need to port them yourself if you don't find a working one. you can search and try different ROM's, needrom.com is a good way to go. before flashing anything, make sure you never replace preloader or DSP_BL in flashtool. that is, for now, all can say. you need to dig deeper into your firmware to get all needed informations.

Need Help with Samsun Galaxy S6 model SM-G9200

Good afternoon all
i hope i come to the right place to post here
i have a Samsun galaxy S6 model SM-G9200 that i believe from research originated from Hong Kong / China i picked this device up second hand
when i got the phone i done a factory reset to wipe it clean after that process i then went to install the software i wanted to use but during the process of setting up my Gmail account the phone started installing random software without permissions
some of the software was browsers other app managers many different battery and phone performance optimizers and some porn apps
now i suspect that its been messed with had a custom rom installed but at the same time being from Hong Kong / china i suspected it may not be a legit
after a little research it appears that the phone looks genuine screen quality is good and build quality seems normal i had checked the IMEI number online 2 sites confirmed that the IMEI is valid and unblocked
i had noticed tho the serial number reads 123456789ABCDEF
so my question is can someone help me with getting the factory stock rom and the tools or instructions on how to install it
now i am a little confused while searching for the rom and the install instructions as googling this model phone seem to keep throwing up the phone being Duo but this being a single sim phone
as i cannot post screenshots of the system information i will type it in here to help identify
About phone
device name Galaxy S6
Model Number SM-G9200
baseband version G9200xxu1AOBN
Kernel Version
3.4.5
[email protected] #1
Fri Jan 8 21:24:17 CST 2016
Build Number LRX22G.G9200XXU1AOBN
Software Version 637AF0A.V19
any help would be very appreciated
many thanks in advance

sounds like a modded firmware to me. wipe everything and flash the stock rom via odin. after that it should be normal.

[Completed] Help!! Galaxy J100H not registered on network.

Greetings, sharing here my particular problem from top to bottom just to take advice in general.
First of all, I live in Cuba, so my one and only network is Cubacel which runs GSM 900 mhz, so far so good with most phones.
I am between phones so I boorrowed this used J100h from a friend, which received it as a gift and has never been used. I performed a hard reset to wipe password, data, etc. Phone boots ok but no calls with cuban SIM.
The curious thing is that it does recognizes Cubacel network, it evens shows the changes on signal intensity. Bu when I try to manually add it, it finds and displays the network by its name, but reports an error when trying to register.
After 3 days of internet search I´ve narrowed to the following: I suspect the phone was unlocked or flashed previously, there is no network promo when turning on the phone but there is chinese rooting software installed and the cell is, or seems via root checker, rooted. Thought an extra /01 after the IMEI was a sign of corruption until I leraned about IMEI SV. Anyway, following this thought installed busybox and root explorer, checked efs folder, finding subfolders such as imei, factory app, etc, BUT NO .NV file. inside imei folder ther is a imeino1 file with the correct imei, but no .nv file outside. Is this fixable?? GSII repair doesnt work because seems theres is an error with the busy box install, what gives me doubts if the phone is really rooted, and if i need to be online to install busybox properly.
So, If I decide to try and flash stock rom and see if this fixes the problem here is my main doubt, which may seem obvious for some but i simply can figure out. Which stock rom version do I choose? the product code of the cell is ITV, and the bootloader also points to the italian version but the currently installed rom ends in AOG2, seemingly a greek version. I live in Cuba and everywhere I look people say that since the telephone is sim free you can install any rom, but the is no "any" or standard rom either in samsung firware o sammobile. Do I flash the same rom? do I flash the one matching the bootloader? Which stock rom version should I choose?
Very much appreciated if you have gone so far in this reading and have some piece of advice. Also excuse terrible English.

Hi !
I see plenty of firmwares on samsung website so pick one and see how it works , it doesn`t matter the region , you won`t damage anything , maybe the modifications that has been made on the device borked the network , clean stock firmware flash may resurrect it and try the one which matches the bootloader
You may have a look here as well https://forum.xda-developers.com/android/development/rom-gennxt-prerooted-stock-t3126368
Good luck !

Region change

Might be a few stupid questions, but here it goes.
I'm trying to get native call recording by changing the region on my Find X2 Pro. I'm currently running on Android 11 version C72 in UK
Code:
[ro.vendor.oplus.euex.country]: [GB]
[ro.vendor.oplus.market.name]: [OPPO Find X2 Pro]
[ro.vendor.oplus.operator]: [EE]
[ro.vendor.oplus.regionmark]: [EUEX]
[ro.vendor.oppo.exp.version]: [CPH2025EE_11_C.72]
The current guide for switching region doesn't work as the code to access the regions doesn't work anymore (past version C.61, I think). Tried also some roll back firmware's I found online, but don't work.
So, my questions are:
1. If I do a factory reset, will the phone revert to the Android version the phone came with (Android 10 ColorOS 7.0) or will is stay on Android 11 C.72 with all the data wiped.
2. If I do a factory reset and it stays on Android 11 C.72, and take the sim out, do not connect to wifi (without wifi I know I won't be able to connect with a google account to restore apps, I will just skip), and in the setup I select a region that supports call recording (like Singapore) and after I finish the setup put in the sim, will I have native call recording, theme store and any other goodies that have been removed in the EU/UK market?

May I ask how did you find this info about your device?