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Hi, my lt15i with 2.3.4 android, randomly doesn't boot after charging or after a shutdown. When this happens i need to remove battery, maybe twice. Once its on, i have no problems, but when i turn it off i never know if i will be able to boot it again without having to open it up and remove battery.
I've had the phone since december 2011, and after a couple of days i had the problem.. it's been on and off since.. in the last month it happens almost evey day.. but there has been a period when everything was ok and i forgot about the problem..
It may be coincidence, but it seems that if i turn it off with wifi on, it won't boot. If i turn wifi off before powering down, it seems to be ok.
it might be an app acting up or a bug, repair it with SUS
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unrelated topic, if you have some time please check this thread
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
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355
Don't forget to mark the Correct Answers & Helpful Answers
unrelated topic, if you have some time please check this thread