[Q] My SGS3 Started to be very slow and laggy - Galaxy S III Q&A, Help & Troubleshooting

I use stock rom (original) I9300XXEMC2
Kernel 3.0.31-1042335 [email protected] #1
Android version 4.1.2
My phone started to be slow and laggy. When I get a call it takes about three seconds to recognize the caller. I get alot of apps crash, I mean apps suddenly closes(I started to play a short video and then 3G Watchdog and PlayerPro got close).
What could be the reason for the laggs and slowleness of the phone?

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Your rom has the sds fix so it might be the fix kicking in to save your phone. First try clearing cache and dalvic in recovery and fixing permissions, if still laggy then factory reset.

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what does clear dalvik and catch do? do I need to backup the phone before I do this things? (I'm not talking about the reset only clear)

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11alex11 said:
what does clear dalvik and catch do? do I need to backup the phone before I do this things? (I'm not talking about the reset only clear)
Click to expand...
Click to collapse
It clears the cache and clears the dalvik for details use Google but Dalvik is basically VM .
Backup is not relevant to either both are rebuilt on next boot .
jje

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boomboomer said:
Your rom has the sds fix so it might be the fix kicking in to save your phone. First try clearing cache and dalvic in recovery and fixing permissions, if still laggy then factory reset.
Click to expand...
Click to collapse
I have only "wipe cache partition". where is dalvik and fix permissions?

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11alex11 said:
I have only "wipe cache partition". where is dalvik and fix permissions?
Click to expand...
Click to collapse
ADVANCED.
jje

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I don't have advanced...This is the options I have:
reboot system now
apply update from ADB
apply update from external storage
wipe data/factory reset
apply update from cache

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You need CWM recovery .
Use Philz from development .
jje

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I use rom stock and original kernel I also don't have root.
Is it possible to do it without root and without changing recovery?

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11alex11 said:
I use rom stock and original kernel I also don't have root.
Is it possible to do it without root and without changing recovery?
Click to expand...
Click to collapse
No
You really need to read the basic faqs and guides .
jje

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11alex11 said:
I use rom stock and original kernel I also don't have root.
Is it possible to do it without root and without changing recovery?
Click to expand...
Click to collapse
If you're not de-odexed (which you won't be since you're not running a custom ROM) there's not a lot "Wiping Dalvik-Cache" will do. Dalvik-Cache is used when you have dispensed with odex.
Essentially, every app you have has an .odex file.
so:
/system/app/MMS.apk
/system/app/MMS.odex
Most custom ROMs are "de-odexed" which means they get rid of all the .odex files and replace them with dalvik-cache files.
Basically what I am saying is you don 't have any to clear.

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I wrote that I use stock rom so I don't want to root my phone.
don't suggest things that can't be done or I don't want to
Anyway thatks

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I didn't. I told you it's irrelevant.
All you can do is factory reset or flash official roms. Or dummy file generator.
Just read "unusual freezing" thread
Sent from my GT-I9300 using Tapatalk 2

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I wiped partiions cach and it helped

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11alex11 said:
I wiped partiions cach and it helped
Click to expand...
Click to collapse
How did you do that?

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using recovery mode

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11alex11 said:
using recovery mode
Click to expand...
Click to collapse
Saved my life!
Thanks!
Guide to recovery mode on youtube:
Search for:
"How to Wipe Galaxy S3 Cache Partition"
Didn't lose anything.

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Still have the problem. Now it also sometimes restart itself.
Any other solutions except root & wipe?

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Factory reset .
Still a problem then a service centre is required .
jje