Got samsung monte s5620.
tried some code. mobile crashed.
Flash with other firmware MFJF1. and mode it with android 3.0
back to another firmware JPKC1. qwerty keypad and preety fast.
will try other afterwards
and will upload tutorial after my exams over. may be after 23rd december.
by the way here are some firmware for lots of mobiles.
enter captia and you are good to go. or register in forum.http://www.faq4mobiles.de/flashes