samsung galaxy s2 continually flashes and will not turn on I hope someone can please help me!! I have had my galaxy s2 for about 1 year with no problems until now.  I have never dropped the phone or gotten it wet etc...today I forgot to pay my bill and phone was shut off by ATT. Once I realized, I paid the bill and had it turned back on.  When it came back on, I could make and receive calls however I Could not connect to the internet or use facebook without turning on WIFI.

If I tried to use internet with no WIFI it said no internet connection.  I then decided to turn the phone off by pressing and holding down the power button.  I waited a few seconds then tried to turn the phone back on.  It began to boot up by flashing the normal samsung galaxy s2 screen.  Instead of fully booting, it continually flashes the samsung galaxy s2 screen over and over.  After 10+ minutes of this, I decided to remove the battery and try it that way.  I am still having the same issue!  

The battery is fully charged and when I try to connect it to my computer, the computer does not reconize any decives.  I have a lot of pictures, videos and contacts that I am extremely afraid to lose because I have not copied them to my computer for quite some time....I pray that someone can please help me!!
As far as I can tell this is what you need to do. NOTE: This information comes from my research and not my experience and while this may make your phone usable you may lose your data. I suggest removing your microSD card as it is most likely where your pictures and video are:


Download ODIN from here
Register at Sammobile here
Download your firmware here
Open ODIN
Put your Firmware.tar file in the PDA box and tick PDA (DO NOT TICK OR UNTICK ANYTHING ELSE)
Attach your phone to your computer using your USB cable and click Start. Don't do anything else until it is done.