setool2lite
и скрипт для удаления предустановленного, неудаляемого контента контента:

delfile:/tpa/preset/default/audio/Latin.3gp
delfile:/tpa/preset/default/audio/Musifiola.3gp
delfile:/tpa/preset/default/audio/Not Late.mp3
delfile:/tpa/preset/default/image/Rose.gif
delfile:/tpa/preset/default/image/Sharplight.jpg
delfile:/tpa/user/picture/Call.jpg
delfile:/tpa/user/picture/Sony Ericsson.gif
delfile:/tpa/preset/system/ams/fotoquestfishing.jar
delfile:/tpa/preset/system/ams/minigolfcastles.jar
delfile:/tpa/preset/system/ams/MOBILEPRINT.jar
delfile:/tpa/preset/system/ams/photomate.jar
delfile:/tpa/preset/system/ams/TennisMultiplay.jar
delfile:/tpa/preset/system/ams/fotoquestfishing.jad
delfile:/tpa/preset/system/ams/minigolfcastles.jad
delfile:/tpa/preset/system/ams/MOBILEPRINT.jad
delfile:/tpa/preset/system/ams/photomate.jad
delfile:/tpa/preset/system/ams/TennisMultiplay.jad
delfile:/tpa/preset/default/java/fotoquestfishing.jad
delfile:/tpa/preset/default/java/fotoquestfishing.jar
delfile:/tpa/preset/default/java/minigolfcastles.jad
delfile:/tpa/preset/default/java/minigolfcastles.jar
delfile:/tpa/preset/default/java/MOBILEPRINT.jad
delfile:/tpa/preset/default/java/MOBILEPRINT.jar
delfile:/tpa/preset/default/java/photomate.jad
delfile:/tpa/preset/default/java/photomate.jar
delfile:/tpa/preset/default/java/TennisMultiplay.jad
delfile:/tpa/preset/default/java/TennisMultiplay.jar
delfile:/tpa/preset/wizard/sug_back_key_img.gif
delfile:/tpa/preset/wizard/sug_clear_key_img.gif
delfile:/tpa/preset/wizard/sug_long_back_key_img.gif
delfile:/tpa/preset/wizard/sug_rightnow_key_img.gif
delfile:/tpa/user/music/videodj/Adventure.amr
delfile:/tpa/user/music/videodj/Enthusiastic.amr
delfile:/tpa/user/music/videodj/Getting Closer.amr
delfile:/tpa/user/music/videodj/HongKong Action.amr
delfile:/tpa/user/music/videodj/LA Vice.amr
delfile:/tpa/user/music/videodj/Romantic.amr
delfile:/tpa/user/music/videodj/Sci-Fi.amr
delfile:/tpa/user/music/videodj/Silent Movie.amr
delfile:/tpa/user/music/videodj/Sounds of the Jungle.amr
delfile:/tpa/user/music/videodj/Streets of NYC.amr
delfile:/tpa/user/music/videodj/Thriller.amr
delfile:/tpa/user/music/videodj/Wild Wild West.amr
delfile:/tpa/user/video/Fly Away.3gp
delfile:/TPA/SYSTEM/messaging/templates/I love you!/1.TXT
delfile:/TPA/SYSTEM/messaging/templates/I love you!/1_SV.TXT
delfile:/TPA/SYSTEM/messaging/templates/I love you!/ILoveYou1.mp3
delfile:/TPA/SYSTEM/messaging/templates/I love you!/ILoveYou2.mp3
delfile:/TPA/SYSTEM/messaging/templates/I love you!/ILoveYou.smil
delfile:/TPA/SYSTEM/messaging/templates/I love you!/LOVE1.GIF
delfile:/TPA/SYSTEM/messaging/templates/I love you!/LOVE2.GIF
delfile:/TPA/SYSTEM/messaging/templates/I love you!/TITLE.TXT
delfile:/TPA/SYSTEM/messaging/templates/I love you!/title_sv(ro).txt
delfile:/TPA/PRESET/SYSTEM/SOUND/phoneopen1.3gp
delfile:/TPA/PRESET/SYSTEM/SOUND/phoneopen2.3gp
delfile:/TPA/PRESET/SYSTEM/SOUND/phoneopen3.3gp
delfile:/TPA/PRESET/SYSTEM/SOUND/pttbargealert.3gp
delfile:/TPA/PRESET/SYSTEM/SOUND/pttflooravailable.3gp
delfile:/TPA/PRESET/SYSTEM/SOUND/pttfloortaken.3gp
delfile:/TPA/PRESET/SYSTEM/SOUND/pttringtone.3gp
delfile:/TPA/PRESET/SYSTEM/SOUND/pttspeaknow.3gp
delfile:/TPA/PRESET/SYSTEM/SOUND/sportabove.3gp
delfile:/TPA/PRESET/SYSTEM/SOUND/sportbelow.3gp
delfile:/TPA/PRESET/SYSTEM/SOUND/SPORTEND.3GP
delfile:/TPA/PRESET/SYSTEM/SOUND/sportfailed.3gp
delfile:/TPA/PRESET/SYSTEM/SOUND/sportmilestone.3gp
delfile:/TPA/PRESET/SYSTEM/SOUND/sportstart.3gp

Этот текст копируем в блокнот и сохраняем в .txt

2.выключаем телефон, подсоединяем к компу с зажатой клавишей C.
3.открываем setool,type phone выбираем k790 ищем Misc files нажимаем на ...добавляем тхт файлик
4.нажимаем write script
по окончании операции будет надпись Ready
передёргиваем батарейку и включаем телефон.

этот FAQ для к790 но подойдет и для других..