[Xperia Play Q&A, Help & Troubleshooting] cloudnineX:
Well I tried flashing and these are the two logs I got:

02/021/2013 07:21:08 - INFO - <- This level is successfully initialized

02/021/2013 07:21:08 - INFO - Flashtool Version 0.9.10.1 built on 2013-01-09 19:49:47

02/021/2013 07:21:08 - INFO - You can drag and drop ftf files here to start flashing them

02/021/2013 07:21:13 - INFO - Device connected in flash mode

02/021/2013 07:21:35 - INFO - Selected R800i_4.0.2.A.0.69_Generic DE.ftf

02/021/2013 07:21:35 - INFO - Preparing files for flashing

02/021/2013 07:21:36 - INFO - Please connect your device into flashmode.

02/021/2013 07:21:37 - INFO - Opening device for R/W

02/021/2013 07:21:37 - INFO - Reading device information

02/021/2013 07:21:48 - INFO - Unable to read from phone after having opened it.

02/021/2013 07:21:48 - INFO - trying to continue anyway

02/021/2013 07:21:48 - INFO - Start Flashing

02/021/2013 07:21:48 - INFO - Processing loader

02/021/2013 07:21:48 - INFO - Checking header

02/021/2013 07:21:48 - INFO - Ending flash session

02/021/2013 07:21:48 - ERROR - Error in processHeader : 2 : The system cannot find the file specified.

02/021/2013 07:21:48 - ERROR - Error flashing. Aborted

02/021/2013 07:21:49 - INFO - Device disconnected

AND

02/022/2013 07:22:09 - INFO - <- This level is successfully initialized

02/022/2013 07:22:09 - INFO - Flashtool Version 0.9.10.1 built on 2013-01-09 19:49:47

02/022/2013 07:22:09 - INFO - You can drag and drop ftf files here to start flashing them

02/022/2013 07:22:14 - INFO - Device disconnected

02/022/2013 07:22:18 - INFO - Selected R800i_4.0.2.A.0.69_Generic DE.ftf

02/022/2013 07:22:18 - INFO - Preparing files for flashing

02/022/2013 07:22:19 - INFO - Please connect your device into flashmode.

02/022/2013 07:22:28 - INFO - Device connected in flash mode

02/022/2013 07:22:29 - INFO - Opening device for R/W

02/022/2013 07:22:29 - INFO - Reading device information

02/022/2013 07:22:29 - INFO - Phone ready for flashmode operations.

02/022/2013 07:22:29 - INFO - Current device : R800at - CB5A1CRFQF - 1248-6414_R35C - 1245-8821_3.0.1.B.0.270 - ATT-1-2-5_3.0.1.B.0.270

02/022/2013 07:22:29 - INFO - Start Flashing

02/022/2013 07:22:29 - INFO - Processing loader

02/022/2013 07:22:29 - INFO - Checking header

02/022/2013 07:22:29 - INFO - Flashing data

02/022/2013 07:22:31 - INFO - Loader : S1_Loader_Root_773f - Version : R4A066 / Bootloader status : ROOTABLE

02/022/2013 07:22:31 - INFO - Processing amss_fs_zeus.sin

02/022/2013 07:22:31 - INFO - Checking header

02/022/2013 07:22:31 - INFO - Flashing data

02/022/2013 07:22:32 - INFO - Processing amss_fsg.sin

02/022/2013 07:22:32 - INFO - Checking header

02/022/2013 07:22:32 - INFO - Ending flash session

02/022/2013 07:22:32 - ERROR - ERR_SEVERITY="MAJOR";ERR_CLASS="SECURITY_CLASS";ERR_STATIC="SIN_HEAD_PARSE";ERR_DYNAMIC="sin";

02/022/2013 07:22:32 - ERROR - Error flashing. Aborted

02/022/2013 07:22:32 - INFO - Device connected in flash mode

02/022/2013 07:22:33 - INFO - Device disconnected

02/022/2013 07:22:34 - INFO - Device connected in flash mode

NB: My phone model says R800i on the back behind the battery but I see in the info it says Current device : R800at :confused:

This is exactly how the phone came sealed in the box by the way.