U must use: Downloads - R8BF003_RED52 - Top Sony Forums

K800_R8BF003_FS_VFE_LIVE_2_RED52 or K800_R8BF003_FS_VFE_LIVE_3_RED52

VFE_LIVE_2 (English - Arabic - German - French - Hungarian - Italian - Turkish)
VFE_LIVE_3 (English - Bulgarian - Czech - German - Croatian - Romanian - Slovenian)

K800_R8BF003_MAIN_VODAFONE_WI_RED52


And CDA: Downloads - k800custpack - Top Sony Forums

When keypad is unlocked click:

> * < < * < *

And see Service info > Software info

CDA ...