Sony M keep restarting after upgrading to 4.3

[esza]

Hi. First of all.. Sony always my favaurite and first choice. 

I brought Sony M last december. I loved it so much. I kept my Sony M updated with all Sony new updates. 

But, after I'm upgrading my Sony M to android 4.3 , My Sony keep restarting automaticly. It also lag sometimes.

Lately it getting WORST. 

What should I do.?

Factory Data Reset is my last option.

Please.

I need some solution for my problem.

I was big fan of Sony products and this upsets me a lot.:smileyangry: 

[_alexdon_]

Does the same occur without the SIM?

[esza]

No. I dont think so.

My Sony doesnt display any weird messege or other warning.

With or without SIM.

It just restarting after lag for about 1 minute.

It keep repeating like that after that. 

[_alexdon_]

Boot the phone in safe mode,see how it goes:

http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008

[esza]

Okey. My Sony is on Safe Mode . Then.? What do I do.?

[esza]

Hi, I need some help here.:smileysad:

How to know any downloaded application are affecting Sony phone negetively.? 

I'm on Safe Mode already.

Please share me some tips..:smileyhappy:

[Samuel1]

Hi and welcome to the community! Since you're new please be sure that you have checked out our Discussion guidelines.

Not really sure what you mean. When the phone is in safe mode it doesn't load any 3rd party apps.

[_alexdon_]

Does it still restart?How is it behaving?

[esza]

Well, some widgets and applications on my homescreen were dissappear.

Which means is I have to add it back if I want to.

My keyboard setting back to default Sony's setting.

Moreover, my Sony seems more light & smooth than before. 

Untill now, there no lag or sudden restarting. 

May I know why.? It all done after I'm on Safe Mode I do nothing while I'm on Safe Mode. 

Actually, I'm still new to android. So there's a lot thing I need to learn about it. 

[esza]

First of all, thank you for you time. 

I'm still new to Android and smartphone, please guide me and correct my mistake if I'm wrong. 

In Normal Mode, user usually installed some applications we want on our phone. 

That is what we called "3rd party apps", isn't it.?

Some apps may affecting our phone negetively such as sudden restarting, lag , sudden closed apps and etc. isn't it.?

(Because I'm facing the same problem lately. Then I were suggested to turn on my phone in Safe Mode. )

On Safe Mode, I do nothing, but I realized some of my widgets and downloaded applications were dissappeared from my homescreen which means I have to add it back if I want to.

The question is, how do I know which downloaded application that caused my Sony became lag and sudden restarted before I'm on Safe Mode.? So that I can uninstall it when I'm back on Normal Mode.?