[Q] Data connection not working after flashing custom rom :'( - Galaxy S II Q&A, Help & Troubleshooting

I'm having a problem since I flashed the sensation rom (by crysis21) on my SGS2 yesterday.
My internet connection (mobile network) doesn't work anymore
I checked the APN settings and already resetted them and enterd my APN settings again. But it still doesn't work. I also restarted the phone multiple times.
Does anybody know where the problem is?
Installation steps were:
*copying the rom to sd
*CF-rooting the kernel via Odin
*booted up in CWM recovery and chose "install from zip file" and installed the rom (without any wipes)
Before I had the default samsung factory rom on it.
Have I made a mistake?
regards
lunatikk

try this http://forum.xda-developers.com/showthread.php?t=1260715

lunatikk said:
I checked the APN settings and already resetted them and enterd my APN settings again. But it still doesn't work. I also restarted the phone multiple times.
Click to expand...
Click to collapse
Have you checked the APN settings are the good ones? One thing is to have ones enabled and other totally different is to have ones that actually work.
Also when you go from Stock to Custom ROM you should do a full wipe!
Go to CWM and format /system, /data, /cache and reinstall the ROM.

warrez said:
try this http://forum.xda-developers.com/showthread.php?t=1260715
Click to expand...
Click to collapse
thanks, I'll check this out as soon as I get home.
I refrain a little from doing a full wipe because I don't want to get all my apps deleted (and I'm a little too lazy to perform a backup). Would mybe a new modem solve this problem?
And of course I checked the APN settings. I deleted the existant APN setting and added a new one so the settings can't be the problem.
I also checked some entries in Settings/Phone Info/Status.
It says here (translated from german):
Mobile Network Type: HSDPA
Service State: Function (or working rather)
Mobile Network Status: Disconnected (but sometimes it says also connecting here, though it never really gets conencted)
regards,
lunatikk

Even though I wiped everything, the data connection still doesn't work.
I did
"Wipe data/factory reset"
"Wipe cache partition"
"Wipe Dalvik cache"
and after that I installed the Sensation rom zip file again.
The data connection still doesn't work :'( (I added the APN after install, of course - the settings are 100% correct).
I also installed another rom (infected rom) but there's still no data connection.
Am I missing something? I'm getting really desperate over here.
regards
lunatikk

You could try flashing another Stock ROM via Odin and see if in stock works or not, then try a Custom ROM.
Sometimes the phone takes a while once you flash a new ROM till it establishes a decent 3G connection. Having "Data enabled", how much did you wait for the phone to establish a connection?

AzureusPT said:
You could try flashing another Stock ROM via Odin and see if in stock works or not, then try a Custom ROM.
Sometimes the phone takes a while once you flash a new ROM till it establishes a decent 3G connection. Having "Data enabled", how much did you wait for the phone to establish a connection?
Click to expand...
Click to collapse
I thought so too... Well, at work I waited some hours for the data connection being established but nothing happened.
This is crazy. I even restored my system with CWM and it still ain't working.
As soon as my GF comes home I'll replace the sim cards. Maybe the problems at the providers side...
after that, I'll try a stock rom (via odin).
thanks for your tip
lunatikk

I have the same problem and I'm on check rom.

i'm having the exact same problem, but with multiple roms and not just one. i tried omega and delv. both of these are giving me no data connection (only at the beginning) but once i restart there's no data connection.
did you manage to figure out what went wrong? I've resulted in my original rom that i had by restoring it using cwm.

dear sir,
my device is micromax canvas a1 aq4501. when I recovering a custom rom like cm13 my device Internet data not connected. I fully checked setting like mobile data, apn, but it still not working.
now I want my device situable custom rom. please give me the right information.
my email id :- [email protected]
your regard,
Jadab Debnath
India

Related

[Q] No data connection after new rom flashed

Hi all,
I've flashed quite a few times before I settled with my current Insanity rom. But then I decided to try out some new ones since I have time during the holidays.
I tried flashing Omega and Delv with cwm (Whatever version they currently have now), both at the startup didn't allow me to bypass by pressing the 4 corners. i thought nothing of it and just continued on and restored my stuff using titanium backup. before my sms, gmail accounts and call logs will get restored but it didn't for both. so i decided to restart my phone to see if it'll come up. it did not. in fact, the data connection goes missing. (i did get data connection when i first loaded up the phone right after the flash using cwm) i only have full bar of signal, but no data.
I thought it was just a rom thing or a bad download, that's why I tried flashing another rom, but once I restart my phone, the data connection goes.
I got so frustrated that I just restored my old (current) rom from cwm.
If anyone can help me on finding out what may be the problem, that'll be great. I really do want to start flashing different roms again because I'm getting bored with my current one.
thanks in advance!
shirbo.g said:
Hi all,
I've flashed quite a few times before I settled with my current Insanity rom. But then I decided to try out some new ones since I have time during the holidays.
I tried flashing Omega and Delv with cwm (Whatever version they currently have now), both at the startup didn't allow me to bypass by pressing the 4 corners. i thought nothing of it and just continued on and restored my stuff using titanium backup. before my sms, gmail accounts and call logs will get restored but it didn't for both. so i decided to restart my phone to see if it'll come up. it did not. in fact, the data connection goes missing. (i did get data connection when i first loaded up the phone right after the flash using cwm) i only have full bar of signal, but no data.
I thought it was just a rom thing or a bad download, that's why I tried flashing another rom, but once I restart my phone, the data connection goes.
I got so frustrated that I just restored my old (current) rom from cwm.
If anyone can help me on finding out what may be the problem, that'll be great. I really do want to start flashing different roms again because I'm getting bored with my current one.
thanks in advance!
Click to expand...
Click to collapse
I'm sorry my English award is not very good I am a Chinese.
can you make sure that you have wipe your phone 2 times?
wipe data factory reset and wipe cache partition? before you flash a new rom?
and the problem may be your kernel don't work well . you can flash another new kernel or flash a new cwm
wipe your phone is very important
if these mind can not make your data well you should flash your phone
by odin . use this software to make your phone well
thank you for your reply.
I have wiped my phone very thoroughly: wipe cache, factory reset and even dalvik.
aren't the kernels automatically installed when i install through CWM?
i'm not too sure about this kernel thing as the many times I flashed before, I never had to install kernels on its own through odin. i just flash the zip file of the rom through CWM and it's all good.
so you're saying i should use odin to flash instead of cwm? is there a major difference? i'm much more comfortable with cwm though.
Try flashing a new modem .
Check IMEI is correct .
jje
Have you set your APN settings correctly according to your phone carrier's settings?
Also try your carrier's CSC on your phone.
Set your APN manually, I had this before as well...
Other options is to get the Tweaker App from the Market and when connected via Wifi then it sets your APN as well.
Gesendet von meinem GT-I9100 mit Tapatalk
Thanks for the suggestions.
The APN one sounds easier to do. That option's under wireless and networks correct?
Currently, I only have one selected. I'll check it out when I flash the new rom.
What's this csc though??
Sent from my GT-I9100 using XDA App
What's this csc though??
Country specific settings a list of local networks and there settings .
See stock roms thread .
jje

No 3G Icon or Data Connectivity

Hey guys,
Backstory (Not sure if important): I was running Villain ROM for a long time whilst I was over seas, and every time I used WIFI, my phone heated up a lot (around the camera), to the point where I couldn't hold it up to my face to answer a call. My battery also got fairly hot while charging my phone on a boat. During this time I had a lot of issues with it crashing and what not, but data was still working. I charged my phone at the airport and then I tried to turn it on once I got home and the battery was dead. But I had a spare one which I'm currently using.
Anyway, I flashed Resurrection Remix ROM 3.0.5 (22/08/2012) and it failed to work (boot loop), so I flashed Stock Telstra 2.3.6 ROM. Then I tried to re root it and flash RR again and it worked fine. I attempted for a long time to fix the problem by using different modems, and flashing different ROMs etc, but I decided to use Triangle Away to reset Binary Count and then I flashed my phone back with the stock Telstra ROM as I may send it off for repair if I can't fix it. I also used OTA to upgrade it to ICS.
I've made sure that airplane mode is off. I've enabled data/roaming in settings. I've made sure (using power button) that data is enabled. I've checked the APN's and their all correct. I've selected the proper network operator (Telstra). I've gone into USSD Code '*#301279#' and changed the revisions.
I went into the settings using the USSD code '*#*#4636#*#*' and went into phone information. When I click 'Run ping test' it fails with the errors:
Ping IpAddr: Fail: IP addr not reachable
Ping Hostname: Fail: Host unreachable
HTTP: Client test: Fail: IOException
When I press the menu key there is an option called 'Enable data connection', that when I press closes the menu (as if it had worked), but when I opened it again, it says the same thing. There is also never a 3G or Data Icon.
If anyone has any ideas on how to fix this, or anything to try, please let me know.
TL;DR: I've read pretty much everything I could find on Google and nothing is making data work or even appear.
Thanks,
Hi !
I got the I9100 G, and tried many custom AOSP AOKP based rom too. I noticed that I can't get data network with those custom roms.
I also tried to flash modems, reflash with fresh restart, full wipe, etc.. but still nothing.
So I went to a stock based rom, with the Divine rom. And everything work fine.
Now I'm on the RR v3.0.5 and still no data, just wanted to try agan this amazing rom.
But I have to switch back again to the Divine..
Try this one, it should work if you got the same issue, even if I still don't know what it is exactly..
Note that it's for G's only !
let me know if you find another way to get rid of this.
why not try RootBox rom.. it will help you out with the data network problem,,
tobanezam said:
why not try RootBox rom.. it will help you out with the data network problem,,
Click to expand...
Click to collapse
Rb for i9000G?
Swyped from my Galaxy SII
---------- Post added at 12:13 PM ---------- Previous post was at 12:12 PM ----------
nicomuk said:
Hi !
I got the I9100 G, and tried many custom AOSP AOKP based rom too. I noticed that I can't get data network with those custom roms.
I also tried to flash modems, reflash with fresh restart, full wipe, etc.. but still nothing.
So I went to a stock based rom, with the Divine rom. And everything work fine.
Now I'm on the RR v3.0.5 and still no data, just wanted to try agan this amazing rom.
But I have to switch back again to the Divine..
Try this one, it should work if you got the same issue, even if I still don't know what it is exactly..
Note that it's for G's only !
let me know if you find another way to get rid of this.
Click to expand...
Click to collapse
Check your APN settings, if it's correct
Swyped from my Galaxy SII
Rootbox for G's.. Yeah..
Already tested.. Not the latest but the v1.7 and it didn t work..
APN, modems, fresh restart, saving APN on a stock rom + restoring when on a custom like RR or RB, even CM9.. Tried all of this already.
But I didn't tried all modems..
Sent from my GT-I9100G using Tapatalk
I think it is due to your netwolkng

[Q] Lost automatic connection with my data plan

Hi everybody!
Yesterday, I applied a custom rom to my Galaxy Note and after a successful installation, my data plan wasn't working like it used to be.
I have to say this isn't the first time I have done this, and in the previous opportunities after flashing the rom and rebooting, the EDGE/3G icon appeared by itself detecting my data plan. I never had to configure the APN settings (like it is said in many posts I have seen here).
So, when I realize that it wasn't working properly, I re-flashed the rom but didn't worked. So then, I downloaded the ICS stock rom and flashed it through Odin, hoping it would reset all things here and would give me the initial configuration, but that didn't work either.
I have entered through settings and deactivated/activated the options related to mobile data, but that icon never appears or my data connection showed up.
Forgot to mention that this phone was unlocked through cellunlocker by code, and that I can make phone calls with no problem and also the Wifi works fine... And thank you in advance for any advice/help that you could make
If it's happening with different ROMs then take a look at your modem (baseband). Are you using I717UCLF6? Go to System Settings-About Phone-Baseband Version.
Like ^^^^ said, and you didn't say it, but I'm guessing T-Mobile. So flash any ROM you like, reboot and let but settle in, then flash the Blaze 4G or whatever T-Mobile modem works best for you.
You did enter your APN info?
Agoattamer said:
You did enter your APN info?
Click to expand...
Click to collapse
This....^^^^^^^^^^^^^^^^^^^^^^^^^^^................g

[Q] No mobile network after flashing roms

Would like some help. I have flashed CM 11 and can't make calls. It says mobile network not available. Tried flashing AOKP rom as well and same thing. Mobile data works fine, although i have gotten a popup twice that says 'Google Play Services not supported by your device, please contact your manufacturer' (no noticible issues from this, google stuff i've tried so far works). I have included a screenshot so you can see my baseband and rom version, etc.
Now, i had a great deal of trouble getting a rom flashed to start with, CWM put me into a bootloop and TWRP wouldn't flash anything because it said it couldn't mount /storage when i tried. Used Philz advanced CWM (love it btw, will be using it from now on). Still wouldnt flash the hltespr specific CM11 version so had to use the unified hlte version (it gave me the status 7 asserts issue, but editing the asserts out just gave me a bad file error when flashing). I wiped data/cache/dalvik between each flashing. I don't know if any of that would have bearing on this problem, just including any details i can. Any advice?
Verilin said:
Would like some help. I have flashed CM 11 and can't make calls. It says mobile network not available. Tried flashing AOKP rom as well and same thing. Mobile data works fine, although i have gotten a popup twice that says 'Google Play Services not supported by your device, please contact your manufacturer' (no noticible issues from this, google stuff i've tried so far works). I have included a screenshot so you can see my baseband and rom version, etc.
Now, i had a great deal of trouble getting a rom flashed to start with, CWM put me into a bootloop and TWRP wouldn't flash anything because it said it couldn't mount /storage when i tried. Used Philz advanced CWM (love it btw, will be using it from now on). Still wouldnt flash the hltespr specific CM11 version so had to use the unified hlte version (it gave me the status 7 asserts issue, but editing the asserts out just gave me a bad file error when flashing). I wiped data/cache/dalvik between each flashing. I don't know if any of that would have bearing on this problem, just including any details i can. Any advice?
Click to expand...
Click to collapse
Have you upgraded your bootloader to NH7? I know most of the newly-updated CM-based ROMs require you to be on NH7 before flashing. That's most-likely why you weren't able to flash the htlespr ROMs. The unified ROMs no longer include the correct APNs for Sprint, so that's why you don't get service on it. I don't know why mobile data works on it.
topherk said:
Have you upgraded your bootloader to NH7? I know most of the newly-updated CM-based ROMs require you to be on NH7 before flashing. That's most-likely why you weren't able to flash the htlespr ROMs. The unified ROMs no longer include the correct APNs for Sprint, so that's why you don't get service on it. I don't know why mobile data works on it.
Click to expand...
Click to collapse
No, didnt realize that i needed to do that. I'll do some research on it because i don't have any idea how to update the bootloader. If you have a link to a good tutorial that would be wonderful! Thanks!
Ok so i tried that, found this tutorial, followed it, no luck. Tried full wipe/reset after that to see if it would let me install the hltespr versions, still no dice. Same situation, mobile data works, calls don't. Will have to wait till daylight to try texting so i don't wake anyone up but i suspect that texting won't work either. Has anyone experienced this and fixed it? Lol i really didn't drop $100 on a phone to be saddled with all the Samsung and Sprint baloney that it comes with, don't wanna unroot....
Bump
Anyone have ideas on this? Have continued to try fooling around with the udater-script file to resolve the status 7 problem so I can install the hltespr variant, still no dice. Please someone help!
Bump!
Sorry, I typically don't have access to XDA forums on the weekend, so couldn't answer your question till now.
You flashed only the baseband/modem, not the Bootloader. If you want to update the Bootloader, you need to use ODIN to flash the Complete OTA NH7 Update.
In order to update the Bootloader, you need to make sure that you use the PC ODIN (not the mobile one) and that you completely power off the phone before you enter download mode (don't access download mode by using the extended power menu when shutting down the phone). I don't think you need to do the battery pull that Freeza had in his instructions (I didn't do it when I ODIN-flashed the NH7 OTA update), but it wouldn't hurt to do it.
Thanks for that, I will try it as soon as I get home tonight! The next thing I had decided to try was to unroot, to back to stock, then try flashing that before I start with the custom recovery and ROM. Do you think I should do that first before doing the whole thing or could that work just flashing that with my phone as-is?
Verilin said:
Thanks for that, I will try it as soon as I get home tonight! The next thing I had decided to try was to unroot, to back to stock, then try flashing that before I start with the custom recovery and ROM. Do you think I should do that first before doing the whole thing or could that work just flashing that with my phone as-is?
Click to expand...
Click to collapse
Well, I always recommend a full wipe (data, system, cache, dalvik) when flashing ROMs. I haven't wiped my internal storage or external storage since I got the phone, so that's not really necessary.
I don't think that unrooting your current ROM is necessary. Flashing the ODIN OTA update will automatically remove root access, so that's not an issue. Here's the steps I took when I updated to NH7 and installed my current ROM (see my sig):
Make a Nandroid backup.
I always do this just so I have a "record" of what I left behind. It also allows me to have all of my app data that I can restore via Titanium Backup (you have to buy the Pro version in order to restore specific apps from a Nandroid backup). I always store a copy on my ext. storage and on dropbox.
Do a full wipe
As I mentioned above, I always wipe data, system, and the caches when flashing ROMs. While I have to take some time to get the new ROM exactly as I like it, it minimizes any potential FCs and errors that some people get when dirty flashing.
Install NH7 all-in-one via ODIN
I installed the NH7 via ODIN. Please note that this is the fully stock, unrooted ROM and will also install the stock recovery.
Let the phone boot and connect to Sprint. Update Profile and PRL.
I do this periodically whenever I go back to stock (from AOSP). I rarely have connection issues, but updating the PRL an profile can help with those.
Install a custom recovery using ODIN.
My recovery of choice is TWRP, but others have found just as much success with CWM and Philz. Just make sure that you're installing the correct version of the recovery (4.4.X version, not the 4.2.X version). I always reboot to the main system after installing a recovery, but that's up to you. In the rest of this post, I'll say "TWRP," but I really mean "custom recovery."
[OPTIONAL] Make a Nandroid backup of the stock ROM
I always do this, but I recognize that it's not necessary, especially since we can just ODIN back to this image at any time. I just like having the option of having a stock backup on the device (in case catastrophe strikes while I'm away from a computer).
Use TWRP to flash your AOSP ROM of choice.
If you haven't installed any apps or messed around with the settings, you shouldn't have to wipe before flashing, but (in case you haven't noticed by now), I tend to err on the side of caution, specifically: wiping everything (data, system, and the caches) before I flash anything.
Set up the ROM how you like it and [OPTIONAL] make one last Nandroid Backup
Whenever I set up a new ROM to the exact way I like it (statusbar settings, accounts set up, apps installed and configured, etc), I make a nandroid backup of my device. This allows me to go back to that "fresh" image whenever something happens to the device and I don't have to muddle around fixing those minor tweaks. Again, I tend to err on the side of wiping the phone too often and taking too many backups, but I've rarely had issues with my phone and ROMs because of it (to the point where I can spend most of my XDA time helping others with their phones), so it might be prudent to follow the advice.
Anyways, that's how I upgraded to NH7 and installed a custom ROM. Others may take a less conservative approach and you're welcome to adjust any of the optional steps.
Hope this helps!
-Topher
OK, did all that successfully, when it went back to stock stiil had the same issue. Mobile data functions, mobile network for calls/SMS doesn't. Did the whole update prl/profile and even tried reactivating from settings, still nothing. Was able to install custom recovery (Philz) and the hltespr CM11 variant instead of the unified generic version. Still has the same problem, mobile network not available. Everything else works perfectly. I did verify in settings that it still wound up as the NH7 after everything I did. Note I did a full reset before each thing that got flashed in this process, and one more for good measure after. Let it boot to the system between steps too.
Lol I've been rooting and switching between ROMs for years and have never encountered anything like this. I'm stumped....
Verilin said:
OK, did all that successfully, when it went back to stock stiil had the same issue. Mobile data functions, mobile network for calls/SMS doesn't. Did the whole update prl/profile and even tried reactivating from settings, still nothing. Was able to install custom recovery (Philz) and the hltespr CM11 variant instead of the unified generic version. Still has the same problem, mobile network not available. Everything else works perfectly. I did verify in settings that it still wound up as the NH7 after everything I did. Note I did a full reset before each thing that got flashed in this process, and one more for good measure after. Let it boot to the system between steps too.
Lol I've been rooting and switching between ROMs for years and have never encountered anything like this. I'm stumped....
Click to expand...
Click to collapse
Dumb question but are you a Verizon customer or Sprint?
Sent from my SM-G900P using Tapatalk
Sprint, I've had big red before but when they did away with unlimited data it wasn't worth paying their high rates.
Bump!
Anyone have any ideas on this? I am just confounded as to why this continues even after being reset to stock.
Same Issue!!!
I have the exact same issue and have been trying to resolve it for the last 2 days... Did you find a solution?
I have the same problem on a Samsung Mega. LTE and 3G data work but phone won't dial if LTE is active. It WILL voice dial if only 3G is active. Sprint. CM11.
I had this problem after flashing ROMs as well, but went into Settings>Connections>More Networks>Mobile Networks>Network Mode and selected LTE/CDMA....no network had been selected. That fixed me right up. Weird part is, I could still avcess the web without WiFi....but couldn't make calls or ise my bluetooth headset until I had performed the above steps. Hope that helps.
thanks forget the little things reset wifi and sprint cell extender
GAPO said:
I had this problem after flashing ROMs as well, but went into Settings>Connections>More Networks>Mobile Networks>Network Mode and selected LTE/CDMA....no network had been selected. That fixed me right up. Weird part is, I could still avcess the web without WiFi....but couldn't make calls or ise my bluetooth headset until I had performed the above steps. Hope that helps.
Click to expand...
Click to collapse

CM13 works well, but no cell reception, no IMEI

Hey guys
I need some guru help here :/
I've flashed cyanogenmod 13 with android 6.0.1 on my i9300 along with some gapps (stock version). Everything works well, besides the cell reception.
I've been able to see other networks around but couldn't connect to neither of them. (i'm on roaming, in germany, while my sim card and the phone are from poland)
I have applied no signal fix from here which didn't change anything.
Then I've flashed this (the one with "Poland" next to it), but that only made things worse, as the whole "cellular network" menu in settings is greyed out.
What I've figured out is that when typing *#06# the phone app makes some noise and hangs, and in the settings there is no IMEI number.
This leads me to the conclusion that EFS (seems empty in the TWRP file browser) is broken/cleared.
I've seen many instructions on bringing it back to life, non of them are clear to me, and all use Windows. Is there a way to do that on Mac OS, or.. basically is it THE way to go for?
I would appreciate all the help as I need that phone in the next days :/ thanks!
@krecio4:
1. Look for efs-backup. Some kernels create this. Or as part of TWRP-backup. Restore it.
2. Flash latest firmware with Odin. If IMEI is still gone afterwards, try KIES repair function.
3. Let it repair in service center.
rp158 said:
@krecio4:
1. Look for efs-backup. Some kernels create this. Or as part of TWRP-backup. Restore it.
2. Flash latest firmware with Odin. If IMEI is still gone afterwards, try KIES repair function.
3. Let it repair in service center.
Click to expand...
Click to collapse
thanks a lot @rp158!
I've tried searching for an efs backup but no luck :/ any idea where do they create it? restore option only has those files that I've backed up.
latest firmware you mean the official one, right? Is there a way to do it on mac os?
cheers
@krecio4: TWRP backup contains efs-partition, if you chose/ticked it. Kernels (Boeffla, Agni) store it in sdcard0, but if you never flashed a special kernel, it's over.
Firmware means Samsung's stock 4.3 from sammobile.com. Look there, if they offer Odin and KIES for Mac. Otherwise lean a Windows pc. It's useless to make it more complicated by struggling software.
@krecio4: read this. That's not the solution, but if that all caused by actual CM13-nightly, there comes perhaps any...
I have the same problem with latest nightly. This work fine: "cm-13.0-20160523-NIGHTLY-i9300.zip".
@krecio4 I think that you have to first flash latest firmware then root your phone and then you have to use z3x box, hope it will fix :good:
thanks for your sugestions guys
What I did is to get the latest firmware from sammobile, restored it with Odin, phone was working, I was receiving calls and texts.
So I installed TWRP, backed up EFS, System, Data, and one more thing that was marked.
Then i did a factory reset and installed latest CM13 + gapps in one run (as a batch of files, selected the CM13 first, than the gapps in the que)
rebooted
Again - CM13 works well, but it says "please insert SIM card" :/
No IMEI, IMEI SV (Unknown)
Cellular networks in settings are off, and greyed out inside, "preferred network type" is "Invalid Network Mode (-1). Ignore"
Do you think there is any hope?
I noticed that EFS is empty, after restoring it from backup, and rebooting, it's empty again.
so tired of everything, I went back to the original software using this method (even easier than Odin) http://forum.xda-developers.com/galaxy-s3/general/how-to-factory-installed-firmware-sgs3-t1838480
If you come up with some solution, I'd love to try Cynanogenmod for longer and.. for real
1. Be happy, that your efs-data are ok. Make in TWRP a backup of this partition only, for worst cases.
2. Try @mexit's advice.
Can I with no problem have a custom recovery installed while using original firmware?
So you are saying that it might be with the last 3 nightlies that they are messing up with backed up EFS? If so, I'll try installing the one you've mentioned, but now I've list 2-3 days for the whole crap so I will wait until I have too much time But thank you very much for your support!
BTW, I found this as well: http://forum.xda-developers.com/galaxy-s3/general/tool-backup-restore-efs-imei-sgsiii-t1901098
Posting for anybody, as I digged the whole internet for any answers
Install this: https://download.cyanogenmod.org/get/jenkins/162926/cm-13.0-20160524-NIGHTLY-i9300.zip
http://forum.xda-developers.com/showpost.php?p=67034195&postcount=5968
Click to expand...
Click to collapse
ok, as I don't give up easily, as you can see, I did another approach. Backup, backp EFS only.
Installed the edition from 23rd of mai. All good! But during the "installing apps" during the initial boot, close to the end, the battery died (after the screen flickering). but reboot and it all seems to work well Any issues that could appear after an unexpected reboot during the first boot? Do you suggest to do factory reset and flash CM13 + gapps again?
If I understand well, battery died during compiling Dalvik/ART. Should be happen again after cleaning both caches. But to avoid any mess, I would clean flash the ROM again.
So you suggest to do the factory reset, install CM13, install gapps, reboot ?
No.
Wipe system, data, cache, Dalvik cache.
Flash CM13. Wipe cache, Dalvik cache.
and gapps installation shouold be along the CM13 in a que right?
@krecio4: flash GApps afterwards. Read the last posts of CM-thread: your problem was probably caused by a modem-bug in CM, should be gone now.
after the wipe cache & Dalvik?
so CM13, wipe, gapps, reboot?
Ok, very precisely:
flash cm13, wipe 2 cashes, reboot
if net and wifi ok, make a backup of this state
flash GApps, wipe 2 cashes, reboot
case closed

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