Share your experience!
xperia s is continuously rebooting. i tried volume up key + power key press. But still 1 or 2 mins i can use it and then again reboot.
Please provide suggestion. i bought it yesterday and did upgrade to 4 android version as well.
remove the micro SIM card and see if the problem persists, is it a micro SIM card or trimmed SIM card?
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unrelated topic, if you have some time please check this thread
http://talk.sonymobile.com/thread/44888
I had the same problem after changing my Rom on un proper way ,
First of all you must hard reset your phone by using power + volume up keys and wait till 3 times vibrated.
Then use the latest flash tools and copy your Rom to it and put your phone on flash mode and just flash the system.sin and kernel.sin without wiping anything (un mark all wipe options)
it will solve your problem
Thanks for posting and welcome to the forum! 
If the tips by uliwooly doesn't sort it out I'd recommend you to try performing a repair of your phone's software.
You can easily perform the interaction with our program Sony PC Companion, available for download from the link below.
http://www.sonymobile.com/gb/tools/pc-companion/
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If use SPC it will wipe all data frow phone , but if use flashtool with unchecked wipe options the data will be remain.