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Now, my xperia s had many time of restart problems
after I try many tIme to upgrade ICS with pc companIon and update servIce. It failed every time.
the problem wIll be occur after I push power button f or monItor closIng.
Could you help me to fix this problem?
Solved! Go to Solution.
Remove the micro SIM card and turn it on w/o it
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install SUS on your PC -> restart your PC -> run it
once it ask you to connect on flashmode connect your phone and press and hold the power button & volume up (hold it for 5-10 seconds)
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Update Service (SUS)
http://www.sonymobile.com/gb/tools/update-service/
http://www-support-downloads.sonymobile.com/Software%20Downloads/Update_Service_Setup-2.11.12.5.exe
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I was Install ICS by flashtool.
The problem stIll not fIxed at my phone.
Could anyone please recommend to solve thIs problem?
Last nIght, I reseted my phone by power & Volume+ Button.
Afterthat, I cloesd It agaIn. Then, I removed mIcro sIm Iut from slot and put It again.
Now, the problem Had been fIxIng It for +8 hours.
Thank you for your help 
anytime
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