I wanted to sell my Galaxy s2, the guy wanted it to be factory reset, with the original firmware.
I have downloaded GT-I9100_XME_I9100XWKF1 firmware, it worked. But I had the "sim locked" symbol in the notification bar, so I wanted to unlock it.
I downloaded CF-Root-SGS2_XW_OJV_KF1-v4.0-CWM4, and rooted the phone.
Downloaded the Galaxy Unlock app from market place, followed steps 1-3. Phone rebooted.
The unlock didn't work, Instead of a sim locked symbol in the notification bar, I got this stop symbol (like in "no smoking" sign). When I try to go to settings->wireless and mobile network->mobile network, I get "Insert Sim Card to access network services" (sim card is insert correctly, i double checked). When I try to make a call, same message "Mobile Network not Avaliable".
I did some search on the forum, one of the guys said that I should check if the IMEI is matching, I dialed *#06# and got the word: "IMEI", no serial, just that.
I tried to go to Unlock Galaxy app and do a restore efs (step 4), i get the message "You don't have efs save in /sdcard/Galaxy_S_Unlock"
I tried the sim card in a different phone, it works. Tried a different sim in galaxy, it doesn't work.
I tried to do a reset of the device from a backup I had from a month ago, it didn't help, same problem.
What can I do?
here.
http://www.androidapps-home.com/gsii-repair-android-2555711.html
Thank you for the reply, I have tried the GSII_Repair, just now, I installed busybox on android device, and followed the steps.
Step 1 was succesful, so was 2.
After trying step 3 i got the message : "You dont have .nv_data.bak and his md5 files, canceled"
I did more research and found out that I have network lock. Punching the code *#7465625# confirmed it.
I tried that tutorial: http://forum.xda-developers.com/showthread.php?t=1369474
to fix it, it didnt work because I didn't have the hex adress 181468 nor 18145C in my nv_data.bin
do not use galaxy s2 unlock, try galaxy S unlock, this one is better but with greater risk but never heard anyone had issue with this. Use this then do the GS repair again.
should this one did not work, i suggest you do odin flash of official roms. Tried flashing the rom 3 times, I was able to fix the same problem with my galaxy tab before doing that. goodluck.
THank you ! *FIXED*
I just used the original Samsung Unlock, and I didn't notice that it had a fix built in. Tried it and it worked !
vadboy2 said:
THank you ! *FIXED*
I just used the original Samsung Unlock, and I didn't notice that it had a fix built in. Tried it and it worked !
Click to expand...
Click to collapse
Hey dude, which "original Samsung Unlock" you used? Can you post the link for download? Have same problem as you, have tried many things but none worked.....
Great congrats...
Hello everyone, Happy Monday
I have a TOSHIBA TG01 original service provider Telefonica Movistar Spain.
Windows 6.5 OS
I am currently living in Greece and tried to use a WIND GREECE sim card.
At first my phone asked for my PIN, then afterwords asked for a network unlock code. I made the mistake of guessing the code a couple of times.
I finally purchased a network unlock code, but the phone dose not give me the option to enter this code anymore after entering my PIN.
The Home Screen Displays: BLOCKED SIM
If I click on the network icon it asks my for NETWORK PUK, ( I DONT KNOW THIS CODE) what is this? I cant find information about this ether.
I tried to find several ways to get back the option to re-enter the code using the information I can find on internet and forums, but can not find a solution.
It seems other phones give the option at some point using Dialing Pad Codes, or thru some settings... but I cant find a list of Dialing Pad Codes specifically for Toshiba TG01 or any Toshiba phones.
Is there any simple solution to this problem?
Steps I have tried.
1. Hard reset and soft rest... No success.
2. Hard reset and soft rest with sim card... No success.
3. Entering unlock code in Network PUK screen... No success.
4. Entering unlock code in a 0 reception area... No success.
5. Tried several different sim cards... No success.
This seems to be a internal block on the phone, is there anyway to reset this?
personal discovery
1. I used Total Commander to explore my phone.
2. I downloaded identical SimLock files from this site from another person that had a unlocked Tg01 Movistar Spain.
3. Swapped the ones i had on my phone.
4. Realized the phone was unlocked, but was running really really slow.
5. I hardreset my phone, because it wasn't worth it and went back to my normal Blocked Sim state.
This to me means somewhere in those files was the key to my counter reset problem, since the phone didnt ask for anymore Network PUK code.
If someone could enlighten me as to what actually happened?
Hello, I'm wondering if there is a guide or any info at all about rooting the KDDI's SGS3 LTE. I saw a bunch of thread for the NTT DoCoMo version but none about the KDDI version. No idea if they use the same hardware or not.
Root success by flashing CWM recovery and sgs3_rooting_supersu_v3.zip. Those tools are specified for Galaxy S3 NTT Docomo (SC-06D) but they also worked for Galaxy S3 Progre from AU KDDI (SCL21).
Just wondering how to unlock this SCL21, if anybody knows, please share.
brong said:
Root success by flashing CWM recovery and sgs3_rooting_supersu_v3.zip. Those tools are specified for Galaxy S3 NTT Docomo (SC-06D) but they also worked for Galaxy S3 Progre from AU KDDI (SCL21).
Just wondering how to unlock this SCL21, if anybody knows, please share.
Click to expand...
Click to collapse
I am also trying to find out a way to root my SCL21 but am having no luck. I have tried many of the "Universal 4.0.4 rooting methods" but have had no luck. Brong, would you mind sharing exactly what you did? The threads here http://forum.xda-developers.com/showthread.php?t=1999024 and here http://forum.xda-developers.com/showthread.php?t=1996940&page=2 warn about using the docomo method because it bricks the phone. Nothing seems to work with our model. Any help would be appriciated. Thanks.
madj1 said:
I am also trying to find out a way to root my SCL21 but am having no luck. I have tried many of the "Universal 4.0.4 rooting methods" but have had no luck. Brong, would you mind sharing exactly what you did? The threads here http://forum.xda-developers.com/showthread.php?t=1999024 and here http://forum.xda-developers.com/showthread.php?t=1996940&page=2 warn about using the docomo method because it bricks the phone. Nothing seems to work with our model. Any help would be appriciated. Thanks.
Click to expand...
Click to collapse
Hi,
First step is flash the CWM recovery via Odin. You can download CWM recovery from here:
https://docs.google.com/folder/d/0B...ZhbUE/edit?docId=0B98X7HyfoaGaNzNvR052dUp0Wmc
Choose this file: SC06D-JB-KBC-CWM-V6.0.1.2_r10-recovery-odin.tar.md5
Flash that file in Odin, choose the PDA in Odin.
I assume you already know how to flash via Odin, if you dont know just ask me again or try to browse other thread.
Step two is run the CWM recovery. Also, I assume you already know to get into recovery mode. Make backup first in recovery mode, you need to insert external SD card and save the backup in the card.
Step three, download this file sgs3_rooting_supersu_v3.zip from here:
https://docs.google.com/folder/d/0B...ZhbUE/edit?docId=0B98X7HyfoaGaR21wdXZweDdYSXM and save it to the external SD card that you used before.
Step four, run the recovery mode again and choose install from SD card, then choose external sd card and choose the file you donwloaded (sgs3_rooting_supersu_v3.zip). After completing all, reboot your phone and you will see the Super User app. Make sure you download root checker in Play store so you can check whether the phone are rooted or not.
Note: If you run the recovery, the screen will reverse. Dont worry, it works eventhough the screen reverses.
Thats all. I am looking the way to unlock this phone, *#197328640# doesnt work. If you have a clue, please let me know.
---------- Post added at 09:42 AM ---------- Previous post was at 09:27 AM ----------
madj1 said:
I am also trying to find out a way to root my SCL21 but am having no luck. I have tried many of the "Universal 4.0.4 rooting methods" but have had no luck. Brong, would you mind sharing exactly what you did? The threads here http://forum.xda-developers.com/showthread.php?t=1999024 and here http://forum.xda-developers.com/showthread.php?t=1996940&page=2 warn about using the docomo method because it bricks the phone. Nothing seems to work with our model. Any help would be appriciated. Thanks.
Click to expand...
Click to collapse
I see a Vietnam website with video on youtube. It shows that this phone has been unlocked.
http://choimobile.vn/threads/unlock-samsung-s3-scl21-au-kddi-nhat-ban.2699/
Any idea how to SIM unlock this phone?, really appreciate any help.
Thanks.
Updated:
I found a new thing regarding this phone. This phone doesn't support non LTE sim card, even you have micro sim (3G) card from AU KDDI. I am trying to find other LTE sim card from other carrier in order to check whether this phone works on that sim or not.
May be somebody can explain why this phone doesn't support non LTE sim. In case of Galaxy s3 LTE from NTT Docomo, it works when I used 3G sim (FOMA). I cut the 3G sim to fit the micro slot.
unlock for this phone
well, my purpose is/was to unlock this phone so I followed the samsung galaxy s3/note unlock method from here: http://forum.xda-developers.com/showthread.php?t=2014982
(I have/had this S3 Progre SCL21, the same phone in this thread)
I can access all the menu and procedure from that thread below, despite this phone being stock Android 4.04!
----------------
"Main Menu > [1] UMTS > [1] Debug Screen > [8] Phone Control > [6] Network Lock > Options [3]Perso SHA256 OFF > (after choosing this option, wait about 30 seconds, then go back one step by pressing the Menu button then select Back, now you are in [6] Network Lock then choose [4] NW Lock NV Data INITIALLIZ ..... wait for a minute then reboot your phone..."
---------------
I put 3G/2G sim card and the phone shows no service. I even put CDMA network sim, no luck. I don't know if this phone is unlocked. I'm wondering if this phone works only with LTE/4g sim. Right now, there's no 4G/LTE in my region
I assume the phone must support all other bands, if properly unlocked.
Now, I'm wandering through the threads and googling.
So far, I'm looking for Jelly Bean 4.1.1 for this phone, which doesn't seem to be available anywhere, even on samfirmware, only stock firmware
Root/flash CWM recovery and try some other unlock method from out there, (after making a backup Stock ROM and sensitive IMEI/NV data of course)
Please keep everyone updated and keep the spirit alive
aabhash said:
well, my purpose is/was to unlock this phone so I followed the samsung galaxy s3/note unlock method from here: http://forum.xda-developers.com/showthread.php?t=2014982
(I have/had this S3 Progre SCL21, the same phone in this thread)
I can access all the menu and procedure from that thread below, despite this phone being stock Android 4.04!
----------------
"Main Menu > [1] UMTS > [1] Debug Screen > [8] Phone Control > [6] Network Lock > Options [3]Perso SHA256 OFF > (after choosing this option, wait about 30 seconds, then go back one step by pressing the Menu button then select Back, now you are in [6] Network Lock then choose [4] NW Lock NV Data INITIALLIZ ..... wait for a minute then reboot your phone..."
---------------
I put 3G/2G sim card and the phone shows no service. I even put CDMA network sim, no luck. I don't know if this phone is unlocked. I'm wondering if this phone works only with LTE/4g sim. Right now, there's no 4G/LTE in my region
I assume the phone must support all other bands, if properly unlocked.
Now, I'm wandering through the threads and googling.
So far, I'm looking for Jelly Bean 4.1.1 for this phone, which doesn't seem to be available anywhere, even on samfirmware, only stock firmware
Root/flash CWM recovery and try some other unlock method from out there, (after making a backup Stock ROM and sensitive IMEI/NV data of course)
Please keep everyone updated and keep the spirit alive
Click to expand...
Click to collapse
So do I, It's hard to unlock
Thanh_GSM said:
So do I, It's hard to unlock
Click to expand...
Click to collapse
As its not a I9300 nothing from this forum is of use .
Suggest a Google search .
jje
Actually this phone, SCL21 can be used with LTE sim card only. I already tried to use non LTE sim card from KDDI AU with no luck.
What I am thinking is actually this phone maybe unlock-able by using the procedure as you mentioned (NW Lock NV Data INITIALLIZ). Since the phone can only be used with LTE sim card, we need to try LTE sim card from other carrier in order to test.
The problem is I dont have other carrier LTE sim card right now, if you have you can try it.
Update: Also I am wondering how to make this phone works with not only LTE/4G but also with 3G/CDMA. I changed the band to automatic, but there is no luck. I think this phone is locked to be used only with LTE/4G sim card. So, if somebody knows how to deal with this matter (make the phone not only accepts LTE/4G sim card, but also 3G/CDMA sim card) please share with us here.
aabhash said:
well, my purpose is/was to unlock this phone so I followed the samsung galaxy s3/note unlock method from here: http://forum.xda-developers.com/showthread.php?t=2014982
(I have/had this S3 Progre SCL21, the same phone in this thread)
I can access all the menu and procedure from that thread below, despite this phone being stock Android 4.04!
----------------
"Main Menu > [1] UMTS > [1] Debug Screen > [8] Phone Control > [6] Network Lock > Options [3]Perso SHA256 OFF > (after choosing this option, wait about 30 seconds, then go back one step by pressing the Menu button then select Back, now you are in [6] Network Lock then choose [4] NW Lock NV Data INITIALLIZ ..... wait for a minute then reboot your phone..."
---------------
I put 3G/2G sim card and the phone shows no service. I even put CDMA network sim, no luck. I don't know if this phone is unlocked. I'm wondering if this phone works only with LTE/4g sim. Right now, there's no 4G/LTE in my region
I assume the phone must support all other bands, if properly unlocked.
Now, I'm wandering through the threads and googling.
So far, I'm looking for Jelly Bean 4.1.1 for this phone, which doesn't seem to be available anywhere, even on samfirmware, only stock firmware
Root/flash CWM recovery and try some other unlock method from out there, (after making a backup Stock ROM and sensitive IMEI/NV data of course)
Please keep everyone updated and keep the spirit alive
Click to expand...
Click to collapse
Hi everyone ^_^
I just got the SCL21 about two weeks ago. I think it's really strange that even on the Japanese forums, there is very little info on rooting this model. From everything I've found, some Japanese sites also both say it's OKAY to root using the Docomo SC-06D recovery and Superuser zip while others say that it's NOT safe to use that same method and it will result in a bricked phone. Really odd, conflicting messages I think.
What is even more strange is the apparent issue with the screen "reversing"? One of the Japanese sites literally said the screen becomes "upside down" after flashing the SC-06D recovery.
Brong, since you got the root to work successfully , could you please elaborate on the "reversing" of the screen? Is the image upside down and only during the recovery mode? Also, do you know if the root caused you to lose the "osaifu Keitai" touch feature?
Thanks a lot to Brong and everyone else helping out with this model phone!!
Sent from my SCL21 using xda app-developers app
Status of SIM access
Hi,
I tested both a 3G micro SIM and a 4G LTE nano SIM from Softbank in this phone and neither card is recognized. The phone acts as though no SIM is inserted at all. (Complete with the "no smoking" symbol (circle with diagonal line through it) instead of a signal meter. I have confirmed that this phone is indeed sold already SIM unlocked from the factory as the MSL is 000000 just like the Verizon Galaxy S III which is also sold without a SIM lock. Additionally, KDDI lists the SCL21 and all other LTE phones they are selling since the debut last winter as being SIM unlocked devices.
According to some Japanese forums, they are suspecting that this phone has some type of hardware lock (hard locked?)... I contacted the only known person who was successful at using a 3rd party SIM on the Vietnamese Viettel GSM network as in a YouTube video. He wouldn't give me any details except that he must have the phone physically in his shop to modify it and it can't be done remotely. This individual also has screenshots showing the stock ROM version running in Vietnamese which makes me believe that he flashed something to the stock ROM to gain SIM detection of 3rd party cards.. Anyone have any ideas about such a hardware locking mechanism?
brong said:
Actually this phone, SCL21 can be used with LTE sim card only. I already tried to use non LTE sim card from KDDI AU with no luck.
What I am thinking is actually this phone maybe unlock-able by using the procedure as you mentioned (NW Lock NV Data INITIALLIZ). Since the phone can only be used with LTE sim card, we need to try LTE sim card from other carrier in order to test.
The problem is I dont have other carrier LTE sim card right now, if you have you can try it.
Update: Also I am wondering how to make this phone works with not only LTE/4G but also with 3G/CDMA. I changed the band to automatic, but there is no luck. I think this phone is locked to be used only with LTE/4G sim card. So, if somebody knows how to deal with this matter (make the phone not only accepts LTE/4G sim card, but also 3G/CDMA sim card) please share with us here.
Click to expand...
Click to collapse
decoding samsung galaxy s3 scl21
hello guys!!!! im a new member here ... i registered on this site for one reason and that is to help those people who have samsung galaxy s3 scl21 ... because i also got 1. I`ve been searching for months on how to unlock this phone so i could use it in my country (Philippines). I was almost loosing my hope because i was really eager to use this phone because of its features, a nice looking phone and its very expensive here in my country.
Few days ago i was browsing the net, i came across with this code *#197328640# that opened the window for me on how i could use the phone with any kind of sim card wether its LTE or 3G ..Im telling you guys the answers are all in that code
pinoyakooo said:
hello guys!!!! im a new member here ... i registered on this site for one reason and that is to help those people who have samsung galaxy s3 scl21 ... because i also got 1. I`ve been searching for months on how to unlock this phone so i could use it in my country (Philippines). I was almost loosing my hope because i was really eager to use this phone because of its features, a nice looking phone and its very expensive here in my country.
Few days ago i was browsing the net, i came across with this code *#197328640# that opened the window for me on how i could use the phone with any kind of sim card wether its LTE or 3G ..Im telling you guys the answers are all in that code
Click to expand...
Click to collapse
can you share step by step?
my phone need to unlock, please help
He's referring to the service mode. In that case, here are the steps to perform an unlock using the service mode (tested to work ONLY on the docomo models SC-06D and SC-03E; NO GUARANTEE IT WILL WORK ON THE SCL21):
1. Enter service mode by dialing the code in the dialer.
2. Press "UMTS".
3. Press "Debug Screen".
4. Press "Phone Control".
5. Press "Network Lock".
6. Press "Perso SHA256 Off".
7. Menu->Back (if the menu button turns up nothing, then just push "back") then wait 30 seconds.
8. Press "NW Lock NV Data Initallliz" then wait around one minute.
9. Reboot the phone and it SHOULD be unlocked. Works great on the SC-06D and SC-03E, no guarantees with the SCL21. And with the SC-03E newer basebands either hid it away or blocked it out so an older one needs to be flashed in before it will show up for unlocking.
Anyone looking to get one should only do so when they've got a trip to Vietnam in their future (to go get it done in a shop there; they still seem to be the only country with shops doing it) or be using au in Japan.
s3 scl21
that`s the first instruction i found when i was browsing the net and tried it but unfortunately it didnt work...... there are still settings in the service menu and all you have to do is click everything that has something to do with the wcdma to gsm..gsm to wcdma or g to wcdma something like that. There`s also a setting that tells somethin like resetting cant remember the exact word and you have to wait for 90 or 60 secs.and restart the phone .and then go back to changing gsm to wcdma .,there`s a setting also that you have to change the frequency .cant remember the step by step guide but because of my eagerness to use the phone i clicked everthing in the service menu and searched every command listed in there.(dont worry it will not brick your phone).After doing all that... this is what happened .. i thought i failed again because the no smoking sign was still there ...so what i did was i clicked the settings and i was so surprised that the menu for mobile network comes out meaning to say that i was able to unlock the settings on the network ..im telling you guys this is what vietnamese unlockers have been doing to unlock this phone that is why they need the phone physically....thats all thanks
And it never prompted for a SIM unlock PIN again? Somebody really needs to go through this carefully and document it; an SCL21 is only 24-25k yen in Japan; I've heard of people paying more to fix broken screens on their international/American S3s.
scl21
as far as i know this particular phone model (s3 scl21) from AU KDDI is not sim locked . The first time i inserted the 3g simcard, it didnt ask for a pin code or anything ...what i could see was the no smoking sign and the simcard icon is there in the apps menu.
it's diffcult to unlock... i can't use in my country... please help
pinoyakooo said:
as far as i know this particular phone model (s3 scl21) from AU KDDI is not sim locked . The first time i inserted the 3g simcard, it didnt ask for a pin code or anything ...what i could see was the no smoking sign and the simcard icon is there in the apps menu.
Click to expand...
Click to collapse
Hi im from philippine also. Please help me on how to unlock samsung Galaxy s3 progre scl21. Thanks in ADVANCE.
Please help
i need stock rom for SCL21 ...
Please help me link
help
pinoyakooo said:
that`s the first instruction i found when i was browsing the net and tried it but unfortunately it didnt work...... there are still settings in the service menu and all you have to do is click everything that has something to do with the wcdma to gsm..gsm to wcdma or g to wcdma something like that. There`s also a setting that tells somethin like resetting cant remember the exact word and you have to wait for 90 or 60 secs.and restart the phone .and then go back to changing gsm to wcdma .,there`s a setting also that you have to change the frequency .cant remember the step by step guide but because of my eagerness to use the phone i clicked everthing in the service menu and searched every command listed in there.(dont worry it will not brick your phone).After doing all that... this is what happened .. i thought i failed again because the no smoking sign was still there ...so what i did was i clicked the settings and i was so surprised that the menu for mobile network comes out meaning to say that i was able to unlock the settings on the network ..im telling you guys this is what vietnamese unlockers have been doing to unlock this phone that is why they need the phone physically....thats all thanks
Click to expand...
Click to collapse
can you list out the step you taken ? i have 2 phones.
Hi folks,
I have a pickle of a situation here that I am finding it hard to grasp why this Network Lock continues to plague me.
Seems I cannot manage unlock a Galaxy S2 handset even with the correct IMEI.
Or to understand what exactly is going on here which brief story as follows.
The IMEI number is written on the back of the phone under the battery.
The code *#06# displays IMEI also displays the correct IMEI.
I then go to the Vodafone Site to unlock: https://unlock.vodafone.com.au/voila/handsetunlock/self-service.html?method=selectService
I enter in the correct IMEI number, after I enter the Captcha code and click next, it replies with the Unlock Code for me.
But every time I enter in the Unlock Code that I was given, it returns: Network Unlock request unsuccessful.
I then flash the phone with Odin to a official XSA version, still the same.
I then return to the Voda Rom and its still the same.
Yet, if I use a Voda sim on either Rom it works perfect.
For the life of me, how does one get past this Network sim lock?
Anybody got any ideas to why or how to solve this matter?
Ok folks, seems to be moving in the right direction for sorting this out.
Turns out, a friend of mine put his sim in, and entered in passwords causing the lock out.
Got in touch with Voda on the phone, they said the main account holder of the phone needed to request the reset.
As it turns out, the girl whom I also asked for assistance (who I got the handset from) also got Vod to resend a new reset code.
Will take 4 working days there about, so at least the problem will or should be solved.
Failing that, just going to fully flash it to some updated fancy rom
Cheers~!
Hi everyone,
I come to you as I am a noob as far as twinkering with my gt i9300 goes and I think I messed it up big time.
Here is what I did :
I had android 4.2.1 on my gt i9300, the stock rom from sfr (french career).
I network unlocked it using my career official unlock code, which worked great. It recognized my japanese career sim very well (i am in japan now).
Then I got greedy and wanted to update my android version so I downloaded a 4.4 android rom from I don't remember well, and a cwm manager.
The network unlock worked fine at first but after a restart it did not work anymore. It asked me for a network unlock pin.
I thought it was asking for a sim pin at first, which my sim did not have as I hadn't set one. I got mad trying sim pin code and gave up. Had I given it the network unlock code instead of possible sim pin code it might have worked but I will never know.
Then I tried to solve the problem installing android 5.1 cyanogen version but I had the same problem except this time I understood it was asking for the network unlock code. The problem is that when I fed it to him, it did not work, the request was unsuccessful.
So I looked for a solution on internet and found all kind of things:
I read about restoring the efs partition, but i do not have any back up.
I read about installing a stock rom version, change the csc and retry the official network unlock code, but it does not work, whether I restore through Kies (which gives me a vodafone version) or manually (with an sfr version, french vodafone it seems).
I read about installing Galaxy simunlock app after rooting the phone and installing userbox, but it tells me that my locking system is not handled as it is too new.
I upgraded, downgraded, rooted in every possible way but nothing works.
I am running out of solution and I therefore turn to you for help, hoping you will be more creative than me.
I have the official network unlock code, the phone, no back up of any kind and really little hope.
Thank you in advance for any help you could give me !
Have a nice day !
Sadly you didn't make a backup of efs. That should be first thing before playing with customs.
Oh well, I suppose your efs may be screwed up due to entering couple times bad network unlock key.
I suggest go to next corner GSM shop and pay 2400JPY for efs fixing and perm sim unlock. But before that, check your IMEI and serial number are correct. Thay can fix all of this in one step.
You need to do this via box, you can't reprogram that or fix yourself because you did everything that may help and you still have a problem. You can't use any software on efs v2. It will not work.
____________________________________________
P3110 / I9300 / I9100 / NEXUS 5 / iPAD2
Thank you for your quick answer !
I will follow your advice and go to a "professional".
However I don't understand how they are able to do what I can't, do they have special softwares or anything ?
I would like to know because I do have the official unlock code.
Also, I would still like to upgrade to android 5.1 cyanogen version, do you think it will be possible after such a modification ?
I should not encounter any risk if I backup the efs beforehand right ?
Thank you again
Service will connect your phone to, so called, box, ie Z3X Box. This is some kind of pc-phone bridge hardware which can alow to decrypt and encrypt efs files, fix IMEI, serial number, flash firmware, IMEI certificate, remove network locks, sim locks etc.
Of course you can backup your efs now but it is corrupted and useful. Backup this partition after repair. Than you will be able to flash anything you want. Even CM12.1,no problem.
____________________________________________
P3110 / I9300 / I9100 / NEXUS 5 / iPAD2
Ok I understand better now.
Thank you very much for your answers, they have been really helpful !
Do not let them plug your phone to the box if you want to install 4.4 or 5.0 because if you give them they will replace your imei number with a clon imei number and you will stuck with max 4.3 and you need to install a patched modem and kernel every time you format your phone... tell them to try to fix without replacing your imei number first. Replacing the imei number should be the last thing to do...
Why do you think they will clone his phone's IMEI? It's even illegal.
If someone doesn't know how to use box than he should not work in GSM service.
You can rewrite original IMEI and serial number without cloning anything.
An probably IMEI is fine, it's network lock problem.
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P3110 / I9300 / I9100 / NEXUS 5 / iPAD2
Most repair shops dont care its legal or not. Also most costumers dont know this kind of things and as long as phone is working its okay for them. Mine is just a warning to make him look like he knows this things so repairman doesnt do something with no going back...