hello friends i need help

[skiller1213]

I HAVE BEEN LOOKING FOR AN OTA FOR MY TABLET BUT IT SEEMS TO BE SOMETHING IMPOSSIBLE, MY TABLET IS SGTP121MX/S
AND IF SOMEONE HAD A FILE, THANK YOU VERY MUCH
Mexico

ICS Release 5a
info.update.sony.net/ST002/nbx03_002/contents/0009/signed-nbx03_002-ota-121116062.zip

ICS Release 1a
info.update.sony.net/ST002/nbx03_002/contents/0008/signed-nbx03_002-ota-120803078.zip

ICS *REMOVED*
signed-nbx03_002-ota-120410013.zip

3.2.1R2 *REMOVED*
signed-nbx03_002-ota-0042.002.zip