Atlast i got the solution for Sigmatel S4 flight mode

[arifraj]

This is the best solution ive tested for 4 mobiles

with out sim *#3646633#
you wil get eng menu
option 5 misc
option 6 assert testing
now menu will open
u select dual mode

dont forget to thank me http://gsmhosting.com/ubb/wink.gif

[xxxman]

you are very late bro