[Q] Loss of signal and internal memory - Galaxy S II Q&A, Help & Troubleshooting

have a galaxy s2 bought it a few weeks ago second hand, it worked fine for a week or two then i started to get an internal memory error i deleted apps and just installed important ones, moved what i could to the sd car but still fills back up in a few days, i have cleared cache using stock phone, but dont know if it was rooted before by the previous owner, it is sim free using it on 3 Ireland. I also seem to loose signal completely the signal bar goes and i get a circle with a line through it, it comes back after a few minutes did a reset, clear cache and that from the menu after holding home vol u and power.
thanks in advance
model GT i9100
Android version 4.1.2
Baseband version I9100XXMS2
kernal version 3.0.31-1156082 [email protected] #3 smp preemt mon apr 22 16:13:38 KST 2013
build number JZO54K3I9100XWLSS
PDA I9100XWLSS
Phone I9100XXMS2
CSC I9100OXXLS9
Build info mon apr 22 15:48:56 KST 2013

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Enquire with the person you bought it from about this issue. See if he had similar problems too. Also try a different firmware (another JB version, or even ICS or GB). Good luck!

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immortalneo said:
Enquire with the person you bought it from about this issue. See if he had similar problems too. Also try a different firmware (another JB version, or even ICS or GB). Good luck!
Click to expand...
Click to collapse
ive no way of contacting previous owner, i rooted the phone using this http://forum.xda-developers.com/showthread.php?t=2358996&highlight=root
but ive no idea how or what to backup before attempting to do anything further long instructions always confuse me

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got the memory sorted i had about 1.5gb of log files which i deleted

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charlie_gti said:
got the memory sorted i had about 1.5gb of log files which i deleted
Click to expand...
Click to collapse
Thanks for sharing! What about signal issue?
"To err is human, to forgive is divine."
Sent from my SGS II

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immortalneo said:
Thanks for sharing! What about signal issue?
"To err is human, to forgive is divine."
Sent from my SGS II
Click to expand...
Click to collapse
signal hasnt dropped since yesterday i will monitor it over the next few days it normally only happens every few days
EDIT signal dropped earlier tonight turned phone off removed battery and sim turned back on and it was still gone for about 30 minutes then eventually came back

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got a new sim card today same number and network, i had coverage for about 2 hours then it dropped, took out battery and sim put it back and battery went from 40% to 12% but coverage is back for now

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UPDATE
my phone will now relock itself every few days sometimes a few times a day, it also looses the imei number so i have to constantly restore the efs and unlock it again with galaxsunlock any suggestions?

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charlie_gti said:
UPDATE
my phone will now relock itself every few days sometimes a few times a day, it also looses the imei number so i have to constantly restore the efs and unlock it again with galaxsunlock any suggestions?
Click to expand...
Click to collapse
I had this problem my solution was to change the ROM my phone was locked again I used galaxsimunlock for the last time. My phone was unlock for ever.
Sent from my SGH-I777 using xda app-developers app

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I have changed the ROM i am now on the one below but still having the same issue losing signal
model GT i9100
Android version 4.1.2
Baseband version I9100XXMS4
kernal version 3.0.31-1418025 [email protected] #3 smp preemt wed sep 25 18:29:28 KST 2013
build number JZO54K.I9100XWMS1
PDA I9100XWMS1
Phone I9100XXMS2
CSC I9100NEELS1
Build info wed sep 25 18:08:47 KST 2013

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charlie_gti said:
I have changed the ROM i am now on the one below but still having the same issue losing signal
model GT i9100
Android version 4.1.2
Baseband version I9100XXMS4
kernal version 3.0.31-1418025 [email protected] #3 smp preemt wed sep 25 18:29:28 KST 2013
build number JZO54K.I9100XWMS1
PDA I9100XWMS1
Phone I9100XXMS2
CSC I9100NEELS1
Build info wed sep 25 18:08:47 KST 2013
Click to expand...
Click to collapse
Try to check it with diffrent sims or flash CWM on your phone and then flash any custom check of it is working or not
Sent from my iPhone using Tapatalk

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flashed cwm and installed
[ROM][JB 4.3][AOKP/CM10.2/PA] ReVolt JB I9100 [ALPHA][29/09][ReVolt-Control]
having the same issue but now i have no APN and when i try enter one it just stays blank and i have no network access at all should i try a different ROM?

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charlie_gti said:
I have changed the ROM i am now on the one below but still having the same issue losing signal
model GT i9100
Android version 4.1.2
Baseband version I9100XXMS4
kernal version 3.0.31-1418025 [email protected] #3 smp preemt wed sep 25 18:29:28 KST 2013
build number JZO54K.I9100XWMS1
PDA I9100XWMS1
Phone I9100XXMS2
CSC I9100NEELS1
Build info wed sep 25 18:08:47 KST 2013
Click to expand...
Click to collapse
yeah

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ok now i have tried the stock ROM, revolt JB ROM and now Pacman ROM and im still having the same issue

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charlie_gti said:
ok now i have tried the stock ROM, revolt JB ROM and now Pacman ROM and im still having the same issue
Click to expand...
Click to collapse
Do you have a copy of your efs folder? If yes you can try restore it with an app called krool. Some problems of signal are caused for corrupted files in this folder.
Sent from my SGH-I777 using xda app-developers app

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yes but it was after the first root so it might be corrupt...i have restored it a few times issue keeps returning

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Hi,
I have the same issue with my galaxy S2. Did you somehow solve it?
Thanks for your reply.
Cvanyak
charlie_gti said:
yes but it was after the first root so it might be corrupt...i have restored it a few times issue keeps returning
Click to expand...
Click to collapse

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No i didnt get it solved i gave up on samsung after that phone and moved to HTC