HELP NEED TO DOWNGRADE NTT DOCOMO ht-03A FROM 1.6 TO 1.5

[Guest hanrel cellphone]

ntt docomo ht-03A

SAPPHIRE EVT1 32B SHIP S 0N G

H BOOT 1.33.007 (SAPP 2000)

CPLD - 10

RADIO 2.22.19.261

JUL 31,2009

VERSION 1.6

I NEED TO DOWNGRADE FROM V1.6 TO V 1.5 INORDER TO ENTER UNLOCK CODES / FROM NOW EVERYTIME I INSERT NON ACCEPTED SIM DOESNT ASK FOR SIM UNLOCK CODES AND GOES DIRECTLY TO MENU OPTIONS.....I HAD A GOLDCARD AND NEED HELP TO CONTINUE THE DOWNGRADE PROCESS...I DONT KNOW WHAT ROM FILE TO USE FOR THIS PHONE...I AM A NEWBIE HERE AND I DONT WANT TO TAKE THE RISK...ANY CAN DOES KNOW HOW TO DO IT...PLS CARE TO HELP...THANKS

[Guest hanrel cellphone]

ntt docomo ht-03A

SAPPHIRE EVT1 32B SHIP S 0N G

H BOOT 1.33.007 (SAPP 2000)

CPLD - 10

RADIO 2.22.19.261

JUL 31,2009

VERSION 1.6

I NEED TO DOWNGRADE FROM V1.6 TO V 1.5 INORDER TO ENTER UNLOCK CODES / FROM NOW EVERYTIME I INSERT NON ACCEPTED SIM DOESNT ASK FOR SIM UNLOCK CODES AND GOES DIRECTLY TO MENU OPTIONS.....I HAD A GOLDCARD AND NEED HELP TO CONTINUE THE DOWNGRADE PROCESS...I DONT KNOW WHAT ROM FILE TO USE FOR THIS PHONE...I AM A NEWBIE HERE AND I DONT WANT TO TAKE THE RISK...ANY CAN DOES KNOW HOW TO DO IT...PLS CARE TO HELP...THANKS

any one who can help me downgrade my ntt docomo ht-03a from v1.6 to v1.5......>>>>