I got my phone back on Wednesday from the repair people that my insurers use after dropping it last month and shattering the screen inside (fortunately the phone itself still worked properly)
At the time the phone had been dropped, I was having problems with it in that the phone couldn't get a phone signal at all and I was going to fix the problem myself. The repair people knew that it had been jailbroken and I explained that I would fix the problem with the lack of signal myself.
Now, I have a new problem in that every time I get a WiFi signal, it keeps getting disconnected within seconds and I've noticed that the repair people seem to have reactivated the infamous "Flight Mode" problem which seems to have somehow affected the inbuilt WiFi system in that every time the phone manages to detect a signal, whether it's at home or elsewhere, such as university, it loses the signal.
In any case, does anyone have any suggestions on how to fix the problem (I installed the latest VillainROM yesterday which is 3.0) including what modem to use and how to install it?
I would try some different modems and see if you find one that solves your problem. In the first few posts of the VillainRom thread is a link to the thread attachments. Included in there should be a few modems in zip format which you can flash through CWM. Also some of the posters (I think one is geko95gek??) have them in their signatures.
Hope this helps
borgmanjayce said:
I
Now, I have a new problem in that every time I get a WiFi signal, it keeps getting disconnected within seconds and I've noticed that the repair people set to have reactivated the infamous "Flight Mode" problem which seems to have somehow affected the inbuilt WiFi system in that every time the phone manages to detect a signal, whether it's at home or elsewhere, such as university, it loses the signal.
In any case, does anyone have any suggestions on how to fix the problem (I installed the latest VillainROM yesterday which is 3.0) including what modem to use and how to install it?
Click to expand...
Click to collapse
Hey there, not sure whether this is an ongoing issue, but the problem seems to be related to the embedded kernel from VR 3.0 (Nimphetamine 2.0.5) I was facing exactly the same problem. The only way to fix it was to flash a different kernel (siyah 2.2 in my case) .
I tried all available radios but nothing fixed it, maybe pulser has to take care of it in the next release, so flash another kernel and the problem will be solved, good luck!
Yep, as in above post. WiFi drivers are found in the kernel. Try Siyah, Speedmod etc.
Sent from my GT-I9100 using xda premium
Related
After having the phone nearly a week I'm still having problems with the WiFi.
Fine for day one, then noticed when I took it out of my pocket a day later or so that WiFi stated "Error" and couldn't initialize, This happens continously now and sporadically at random intervals (Reboot does not appear to fix it but keep trying does seem to)
Anyone know of this or how to fix it? Or is it just a dodgy handset? (I've still got a couple weeks to swap it over luckily)
I've searched the forums and found something about the same issue after a flashed kernel but I am COMPLETE STOCK, EXCEPT For Root and S-OFF and even restoring to a compeltely basic almost "Out of the box" image does not appear to fix it.
I flashed my Radio today to see if it helps but it doesn't look like it currently.
Any help appreciated (Hope this is in the right forum.
daniluvsuall said:
After having the phone nearly a week I'm still having problems with the WiFi.
Fine for day one, then noticed when I took it out of my pocket a day later or so that WiFi stated "Error" and couldn't initialize, This happens continously now and sporadically at random intervals (Reboot does not appear to fix it but keep trying does seem to)
Anyone know of this or how to fix it? Or is it just a dodgy handset? (I've still got a couple weeks to swap it over luckily)
I've searched the forums and found something about the same issue after a flashed kernel but I am COMPLETE STOCK, EXCEPT For Root and S-OFF and even restoring to a compeltely basic almost "Out of the box" image does not appear to fix it.
I flashed my Radio today to see if it helps but it doesn't look like it currently.
Any help appreciated (Hope this is in the right forum.
Click to expand...
Click to collapse
this error is generally caused by a mismatch between the loaded kernel and the loaded wifi module.
the loaded wifi module must be compiled with and match the loaded kernel. flashing a kernel and then loading a custom rom (which loads its own modules overwriting the modules from the kernel) is generally the way this error occurs.
how you rooted the device could lead to the above wifi error i.e. custom ROM with root, which could result in the above situation, or just flashing superuser.apk which wouldn't result in the above situation.
the part of your comments which stands out to me is that the issue appears to be intermittent. i think the best suggestion and approach, at this point, would be to load a completely stock system.
if the wifi issue still persists, even though it is intermittent, it should be hardware related as my device has never had this type of wifi issue and i'm on a stock ROM. if you're on stock and still have this issue, i would def take it back as it would appear to be hardware related. hopefully the wifi issue will occur while you're at the store making it easy to demonstrate the issue.
hope that helps, good luck!
Hey,
I've been experiencing data connection loss on CM7-14/29, latest VGB, and PP (all MTD/AOSP GB ROMs).
Issue: Randomly, during the day, my internet dies, SMS/Voice appears unaffected.
This results in no connectivity on any apps, the 3G symbol is still there, but is white.
Turning it into airplane mode for 15s or so and then turning it back seems to fix the problem.
Attempted resolutions:
- Wifi sleep policy set to "never"
- Wifi sleep policy in spare parts set to "never"
- ESN swapped twice.
Anybody have any idea on what the hell I can do? BTW: My wifi is almost never on, so I don't think it's related to the WIFI handing off to 3G issue, because I RARELY use WIFI, and this happens (just happened again like 10 minutes ago), and there's no networks here it can even connect to, AND it's disabled.
I'm completely getting killed by this connection issue, b/c it stops randomly, then I don't get e-mail until I take notice that I'm not getting e-mail .
Pretty sure I'd take the SD card corruption issue AND the voice issue over this problem... :'(.
Problem resembles the invalild key issue that happens when switching ROMs, but the ESN swap twice (after two different ROMs were installed) seems to have ruled that out...or maybe I'm not doing something right about the ESN swap? Does the OTHER phone have to be activated during its time?
Anybody have any other fixes I can try?
EDIT:
Problem persists on all MTD AOSP GB ROMs, but right now I'm on CM7-29 with the EC09 modem, ESN swapped after modem flash.
Syndacate said:
Hey,
I've been experiencing data connection loss on CM7-14/29, latest VGB, and PP (all MTD/AOSP GB ROMs).
Issue: Randomly, during the day, my internet dies, SMS/Voice appears unaffected.
This results in no connectivity on any apps, the 3G symbol is still there, but is white.
Turning it into airplane mode for 15s or so and then turning it back seems to fix the problem.
Attempted resolutions:
- Wifi sleep policy set to "never"
- Wifi sleep policy in spare parts set to "never"
- ESN swapped twice.
Anybody have any idea on what the hell I can do? BTW: My wifi is almost never on, so I don't think it's related to the WIFI handing off to 3G issue, because I RARELY use WIFI, and this happens (just happened again like 10 minutes ago), and there's no networks here it can even connect to, AND it's disabled.
I'm completely getting killed by this connection issue, b/c it stops randomly, then I don't get e-mail until I take notice that I'm not getting e-mail .
Pretty sure I'd take the SD card corruption issue AND the voice issue over this problem... :'(.
Problem resembles the invalild key issue that happens when switching ROMs, but the ESN swap twice (after two different ROMs were installed) seems to have ruled that out...or maybe I'm not doing something right about the ESN swap? Does the OTHER phone have to be activated during its time?
Anybody have any other fixes I can try?
EDIT:
Problem persists on all MTD AOSP GB ROMs, but right now I'm on CM7-29 with the EC09 modem, ESN swapped after modem flash.
Click to expand...
Click to collapse
I had the same problem try flashing back to a VZW rom (dl09,eb01, or ed05) and run it for a day and see if you have the same problem...I did and brought it into Verizon none the less with eb01...(not an official Verizon release) and they confirmed my modem was hosed...they over night'd me a new one and I sent the old one back with eb01 on it and they never gave me a problem!
Sent from my SCH-I500 using XDA App
efan450 said:
I had the same problem try flashing back to a VZW rom (dl09,eb01, or ed05) and run it for a day and see if you have the same problem...I did and brought it into Verizon none the less with eb01...(not an official Verizon release) and they confirmed my modem was hosed...they over night'd me a new one and I sent the old one back with eb01 on it and they never gave me a problem!
Sent from my SCH-I500 using XDA App
Click to expand...
Click to collapse
I ran UKB 2.1 for like a week, last week. Not a hiccup. I don't think this is a HW issue, had no problems on UKB, nor OEM Froyo, nor OEM Eclair.
This is the second one (first one's camera HW was dead after like 2 weeks of use, verified by VZW), I really think the modem HW is fine, that's an issue with my setup or my process of flashing or something along those lines, still possibly key related for the authentication keys with Verizon if I'm not doing something right in the ESN swap process.
Maybe I'll try pushing a non-EC09 modem tonight (like ED05) and see if that fixes the issue, any other modems I should try? This problem sucks, just went to lunch, came back, no data *sigh*. Posted this right before I left for lunch (about 1.5 hours ago), right after it happened earlier...
Syndacate said:
I ran UKB 2.1 for like a week, last week. Not a hiccup. I don't think this is a HW issue, had no problems on UKB, nor OEM Froyo, nor OEM Eclair.
This is the second one (first one's camera HW was dead after like 2 weeks of use, verified by VZW), I really think the modem HW is fine, that's an issue with my setup or my process of flashing or something along those lines, still possibly key related for the authentication keys with Verizon if I'm not doing something right in the ESN swap process.
Maybe I'll try pushing a non-EC09 modem tonight (like ED05) and see if that fixes the issue, any other modems I should try? This problem sucks, just went to lunch, came back, no data *sigh*. Posted this right before I left for lunch (about 1.5 hours ago), right after it happened earlier...
Click to expand...
Click to collapse
idk man doesn't sound good. I am getting a replacement for mine (i somehow fried my modem/data or something?), but I just may never flash a rom again because ever since I started flashing my modem has become worse and worse... and now it is completely fried.
I have tried flashing a million modems before without a change, so I doubt that will help you. I would just recommend going BACK to what worked, and sticking with it, or you could fry your **** like I did.
i'm on miui 8.19 and every once in awhile i get a force close for android.phone and my 3g disappears too
I always had very weird data problems on 2.3 MIUI/CM7. The market would hang constantly or the browser would. I'd have to turn on airplane mode etc to get it back to normal.
Elluzion said:
idk man doesn't sound good. I am getting a replacement for mine (i somehow fried my modem/data or something?), but I just may never flash a rom again because ever since I started flashing my modem has become worse and worse... and now it is completely fried.
I have tried flashing a million modems before without a change, so I doubt that will help you. I would just recommend going BACK to what worked, and sticking with it, or you could fry your **** like I did.
Click to expand...
Click to collapse
Umm...ok.
Not trying to be a **** here but flashing the modem software has no impact on the modem hardware itself. Now, it is possible for modem firmware with an issue to cause damage, however, this is unlikely. The modem images are proprietary blobs swiped from OEMs, they're not tweaked by hackers in the Android community. I'm sure some OEM could figure out how to cause damage with one, but realistically they should be fine, even if the OEM was trying to kill it.
If your modem is getting worse and worse, regardless of what you did, it sounds like you had a hardware issue from the start. If that's the case, I'd suggest getting your phone replaced by VZW.
I would be extremely surprised if our problems are related. I'll keep it in mind, though.
T Nigs said:
i'm on miui 8.19 and every once in awhile i get a force close for android.phone and my 3g disappears too
Click to expand...
Click to collapse
Force close on what?
I don't get any force close, 3G just silently fades (not completely, goes from green to white). It still shows 1x or 3G accordingly, though. It's just white, hence, useless. Airplane mode for 10s fixes it.
Does this only happen on MIUI? Mine is pretty bad, happens like once an hour.
DevinLeFevere said:
I always had very weird data problems on 2.3 MIUI/CM7. The market would hang constantly or the browser would. I'd have to turn on airplane mode etc to get it back to normal.
Click to expand...
Click to collapse
Yeah, I expect either of them to glitch or hang if there's no network connection present, I have no issues with that. I have an issue with the fact that there is no network connection present .
Hey guys, new Photon owner (loving the phone) and just wanted to let you all know I found a solution to the SOD and random rebooting for my phone. I hope others who have this issue are able to resolve their problem as easily as I was able to.
It had already been suggested that a loose battery is the culprit however, many of you reported that even after adding padding to make the battery tighter the SOD was still occurring.
I think the issue is how the fix is being applied. I applied a strip of a business card folded over to the end of the battery (opposite of where the contacts are) and not on top of the battery between the cover. Look at attached photo.
This has solved all of my problems and I really hope it can do the same for you!
Cool, I haven't had this issue but hopefully this will help the ones who have it.
Have u updated to the latest sbf? Ever since i did that the other night i haven't had the issue
Sent from my MB855 using XDA App
My phone is running version 45.2.7.MB855.Sprint.en.US
Is there a newer version? When I checked for updates on the phone it says I have the lastest installed.
45.3.6, still no reboots/SoD since I did this
http://www.forums.acsyndicate.net/s...5-CM-9-15-11-latest-ota-for-RSD-BACK-TO-STOCK
DWake014 said:
45.3.6, still no reboots/SoD since I did this
http://www.forums.acsyndicate.net/s...5-CM-9-15-11-latest-ota-for-RSD-BACK-TO-STOCK
Click to expand...
Click to collapse
whenever I do this, and I have done it several times with several releases trying to fix my reboot issue, my phone never seems to be "back to stock". I still have apps showing up that were installed and other little odds and ins that seem to point to it not totally wiping everything out.
Also for reboots, never had a SOD, my seem to be if the WIFI in on and attached and I receive a call, then leave wifi my phone will never be able to make another call until I reboot it and or it reboots itself. And sometimes it'll actually will do it without leaving wifi.... so everyone try that a few times and see if it happens to you. Seems the dialer locks up so I am trying to find out how to replace it with the atrix one or one that will work.
UPDATE: WOW talking about reproing an issue.... as I was typing this on my PC my phone was downloading an app VIA wifi. did not even receive a call or txt. turned WIFI off and noticed a few moments later 3G never came back to replace WIFI(since I turned it off) and now my voice/3g radio is totally locked up. Tried making a call and nothing, no txt. turn WIFI on hit the internet just fine, but no 3G radio!!!! Man this is awesome!!!
Ive searched the forums, googled, factory reset, messed about with *#0011# power save, rebooted/forgot router and I'm STILL having issues with the wifi dropping and reconnecting periodically (maybe once every 10/20 mins?) . Im on BLG8 which is as far as i can tell the latest firmware (im not rooted) for the UK.
Has anyone got a solution to this? The main reason is I use Skype a lot and the call will just drop (obviously) with the wifi drop outs.
No other device has issues with my wifi router.
Any help would be much appreciated
Cheers
Does it make any difference how far you are from the router? Does it always connect fine initially?
I'm having the same issue and i've tried every fix that has been suggested. I dont understand after spending the amount of money i did on this phone that i have to run through the dialer to get it to work properly sometimes. Then other times it still drops out and wont come back on for 5 to 10 minutes. I've changed roms, kernels, and wiped completely i dont know how many times and went back to stock. Still works sometimes and hangs up others. There doesn't seem to be a permanent fix for people lucky enough to have this issue still. My 30 day return is way up and gone so i cant send it back. Samsung cant seem to give me an answer. I'm at a loss for words.
Sent from my GT-I9300 using Tapatalk 2
My 30 days was up, it's still been replaced under warranty. I took it to CPW who sent it away, it came back 'fixed' so I asked them to log into their WiFi... of course, they couldn't and the guy said he would order me a new phone but it would need to come from Samsung. My new one has blazing fast WiFi!
i have the same problem. i was hoping a new rom would fix it, but FWIR its busted. i get 2 bars MAX no matter how far i am from teh router. its fast enough, but it drops out constantly.
also my screen is sometimes slow to turn on from sleep.
im on vodaphone if that makes any difference.
Guys... I had a very similar problem with my phone.
First of all WiFi became very unreliable.. like yours. I changed ROM and it still persisted. I even went completely back to stock.. and it still persisted. Dropping out.. no reliable connection etc etc.
Then it started being really weird.. the touchscreen started responding intermittently. Sometimes I couldn't get it to unlock. And this was all on stock.. no root etc.
I was ready to send it back to be repaired.. and I came to the conclusion that there must be something staying the same.. even after a wipe / reflash. Maybe one of the other partitions was corrupt???
Now I'm not clever enough to investigate.. but I did come to the conclusion that a repartition may wipe everything and make it a real fresh install next time.
So I found an appropriate .pit file and stock ROM and used Odin to flash the ROM and partition the phone.
And it is now all fully functioning again.. no WiFi issues at all.
RTFM THO FFS! Potential for complete brick if you get it wrong
Sent from my Nexus 7 using XDA Premium HD app
just..want..to..delete this post.........and I can't...so there is now filler here....GG k thx bai
It seems to have improved with the latest JB leak, still every now and then but certainly better - i did a full factory reset + cache wipe in stock recovery (im unrooted etc). Still, would a modified kernel/modem fix this very common issue?
This problem is everywhere it seems.
OK so really weird update: my screen unlock is still a bit slow, but my wifi hasnt dropped for a few hours. i went through all the vodafone crap and updated/ran/configured it all, and now it seems fine. seemed vodafone wanted to verify my phone+sim details but couldnt over the wifi so kept trying to do it over the 3g, but couldnt do it quickly enough so the wifi cut it back out again. I have a headphone amplifier that is very sensitive to mobile phone signals. it beeps 4 seconds before i get a message or phonecall, and "ticked" at me whenever my wifi dropped out. its not ticked in hours.
TL;DR anyone on vodafone, run your "my vodafone" application and configure it all. might fix it.
Mine drops wireless a lot when connected to wireless A networks. It seems stable on wireless N networks. Anyone else notice A networks to be worse?
Sent from my Samsung Galaxy S3 i9300 Smartphone
Hi guys,
I wanted to post this in the development thread but since I'm new in here this wouldn't happen
So, here's the problem - my Samsung I9100 phone loses signal and cannot reconnect to the network unless rebooted. You can see the kernel and ROM state from the screenshot.
Every now and then the phone loses signal and unsuccessfully tries to reconnect to the network. I cannot make outgoing calls but am able to receive incoming (but only sometimes, in some cases it wouldn't receive incoming neither). Only a reboot solves the issue but this loss of signal happens at least several times a day and this is quite irritating.
Other problem is when the phone is at a state of no signal, it writes some logs in the system partition in \data\logs which quickly take up all the free memory.
I've been using this ROM since v 3.7. I've updated it twice to get to v 3.91. Through all the releases the issue persisted. I haven't had these problems with other ROMs.
I read somewhere in here that this might be a problem with misplaced or worn-out SIM card. So I put the same SIM in my old Nokia phone and tested for several days - no loss of signal observed in that period.
So any help or advise would be appreciated.
Could this be a ROM issue or a hardware problem? Maybe a kernel problem?
Would be glad if more advanced users give some ideas.
That's it for now, if you got any questions regarding the problem or I missed some information let me know.
Cheers!
Could it be this http://forum.xda-developers.com/showthread.php?t=2162374&highlight=signal+loss
or this http://forum.xda-developers.com/showthread.php?t=2178090&highlight=signal+loss
Have you tried other modem firmwares?
OK, seems like the easiest solution is to just change the modem...
I changed it to XXKI4 from this thread http://forum.xda-developers.com/showthread.php?t=1277593
I'm starting to monitor whether the problem will reoccur.....
Hi have you solved the problem, as I'm having the same problem ?
hi :cyclops:
when I changed the modem to XXKI4 I experienced the same issue almost immediately after reboot....
then I flashed XXLPX (on random), rebooted again. Since then no problems observed, signal strength is high and 3G speeds are OK....
will keep monitoring for several more days and update you on the issue (I'd be really glad if this simple fix solves it )
the_psycho said:
hi :cyclops:
when I changed the modem to XXKI4 I experienced the same issue almost immediately after reboot....
then I flashed XXLPX (on random), rebooted again. Since then no problems observed, signal strength is high and 3G speeds are OK....
will keep monitoring for several more days and update you on the issue (I'd be really glad if this simple fix solves it )
Click to expand...
Click to collapse
Hey, having the same issue... Anything new with this modem?
I've got signal lost almost every day, sometimes few times a day, every few days the signal drops and not back (when I'm clicking on 'mobile networks' I've got the message: "insert sim card - insert sim card to access network services") and only reboot fix this problem (airplane does nothing).
Tried to clean the SIM card, the sim housing, Its not happening in specific place...
I know people who have this issue and uses a different ROMs/Kernels/Modems ROOT/NO ROOT...heres a little list:
Im using right now STOCK 4.0.3 LPG, modem: LQ6 with Siyah kernel 3.4.1
Others using other stock 4.0.3 / 4.0.4 with modems: JHLP9, LPS, ...
Someone mention [not here] about lpx modem that fix it...
If someone else tried it would be great if you share.
thanks!
I had this issue and replaced my battery with another genuine original battery which fixed it totally.
awojtas said:
I had this issue and replaced my battery with another genuine original battery which fixed it totally.
Click to expand...
Click to collapse
Well, sounds weird...I doubt if its the battery... how long you using the new battery? sometimes its just comes and goes....
Signal lost - log screenshot
Ok, I took a screenshot from alogcat at the same time I've lost the signal... (I export the whole log but seems this app is not that smart and its export only after the signal lost so its irrelevant)
At screenshot - only the 'error messages'
Can anyone analyze this error messages? why is it happens?
Suddenly the signal lost sometimes while call sometimes not, at this time I had to reset the device to get the signal back (its happens once per few days), sometimes its lost and back after ~1 minute...
Don't know if this device has a problem (all the problems that i've heard are from this device, no matter what modem each one use) or its something else....
Would like for some help with this log, and the guy who tried the LPX modem - if its works fine now....
Thanks!
no, it doesn't work.
was OK for a few days then the problem started again.
1-2 times a day I have to reboot due to signal loss.
and the irritating part is that while with no signal the battery drains a lot and the don't-know-what-are-these-for logs keep on generating, filling the whole internal memory......
will continue to dig for a solution....
the_psycho said:
no, it doesn't work.
was OK for a few days then the problem started again.
1-2 times a day I have to reboot due to signal loss.
and the irritating part is that while with no signal the battery drains a lot and the don't-know-what-are-these-for logs keep on generating, filling the whole internal memory......
will continue to dig for a solution....
Click to expand...
Click to collapse
Do you have a roaming enable?
Here I suspect its the reason for losing the signal, maybe its the problem...
Did you tried your SIM with other device (not S2)?
PsyOr said:
Do you have a roaming enable?
Here I suspect its the reason for losing the signal, maybe its the problem...
Did you tried your SIM with other device (not S2)?
Click to expand...
Click to collapse
no, roaming is not enabled and I have tried using the SIM on another phone with no problems
one strange thing is that the disconnection happens absolutely random... at first it happened several times a day.. at recent times it is more rarely - every few days.. disconnections are not related to any location or certain conditions of phone usage... simply no idea
soon I will change the ROM (respectively the kernel as well) and see if this continues
Thats weird...a lot of people with other devices have this issue...at first I thought its only on S2 (modem/kernel/hardware) then I thought its a infrastructure issues in our area.... donno mate....
the_psycho said:
no, roaming is not enabled and I have tried using the SIM on another phone with no problems
one strange thing is that the disconnection happens absolutely random... at first it happened several times a day.. at recent times it is more rarely - every few days.. disconnections are not related to any location or certain conditions of phone usage... simply no idea
soon I will change the ROM (respectively the kernel as well) and see if this continues
Click to expand...
Click to collapse
Need help with this also, same issue
posting an update on the situation...
I changed the ROM with full wipe of data as well as internal memory format. Installed the latest 10.1.3 stable ROM from cyanogen - this means different kernel, different radio and a stable ROM.
And it goes on.... if I had money right now I'd just change the phone cos I'm getting sick of this ****
Please HELP
Hi all
PLS help, I have NO signal network and wifi. I bought one i9100 with 4.1.2 (have not lost IMEI- I have it) and can´t have network signal and if I want on my wifi, there is problem it can be open, always icon wifi start and stop in one second. I have nit beckuped EFS, phone was rooted last man from who I have bought.
Now I have Stock I9100XWLSD_I9100VDCLSC_I9100BULS1_HOME.tar
Thanks
the_psycho said:
no, roaming is not enabled and I have tried using the SIM on another phone with no problems
one strange thing is that the disconnection happens absolutely random... at first it happened several times a day.. at recent times it is more rarely - every few days.. disconnections are not related to any location or certain conditions of phone usage... simply no idea
soon I will change the ROM (respectively the kernel as well) and see if this continues
Click to expand...
Click to collapse
As per experience this is also due to battery getting weak. Monitor the % you get this problem the most. If it arises around tje same % level then its battery. Also check your battery by rotating it on table and note if it rotats easily and there is any bump in the battery
Sent from my GT-I9100 using xda premium
---------- Post added at 06:43 AM ---------- Previous post was at 06:42 AM ----------
Paul Koty said:
Hi all
PLS help, I have NO signal network and wifi. I bought one i9100 with 4.1.2 (have not lost IMEI- I have it) and can´t have network signal and if I want on my wifi, there is problem it can be open, always icon wifi start and stop in one second. I have nit beckuped EFS, phone was rooted last man from who I have bought.
Now I have Stock I9100XWLSD_I9100VDCLSC_I9100BULS1_HOME.tar
Thanks
Click to expand...
Click to collapse
This is fault of efs in most cases.
Try jelly snap rom which i have most stable and see if it resolves the issue
Otherwise search how to repair efs if pissible
Sent from my GT-I9100 using xda premium