Cái này tôi sưu tầm đc trên xda.
Bạn làm theo cách này chắc được.
Here are my steps, you can follow it to downgrade your wildfire with cn froyo.
step1 download visionaryplus.r14.apk(this app is fro tmobile g2 but it can give us temp root)
step2 install the apk file. choose Set system r/w after root and Temproot root then wait for a moment and enjoy a coffee.
step3 we get temp root now. open a cmd and input adb shell(make sure you have install relative tools)
step4 input su root(it will change the icon).
step5 copy the mtd0 file to sdcard.
input cat /dev/mtd/mtd0 > /sdcard/misc.img
step6 move the misc.img to your pc and use some hex editor to edit it.
step7 goto 11 row, you will find current version number.
step8 change it to 1.15, save the file.
step9 copy the flash tool and misc.img back to sdcard(flash tool:
http://www.android-hilfe.de/attachme...lash_image.zip).
step10 input cat /sdcard/flash_image > /data/flash_image
step11 input chmod 755 /data/flash_image
step12 /data/flash_image misc /sdcard/misc.img
Now you can flash offical android 2.1 ruu rom(don't forget to make gold card).
so you can use unrevoked tool to root ur wildfire and enjoy any other froyo rom.
ok, works 100% but using better terminal pro.v3.24.apk and z4root.1.3.0.apk with temporaly root.
step6 move the misc.img to your pc and use some hex editor to edit it(ej. Hex Editor Neo)
step7 goto 11 row, you will find current version number.
step8 change it to 1.37.405.1, save the file.
flash with RUU_Buzz_HTC_WWE_1.37.405.1_Radio_13.53.55.24H_3.3 5.19.25_release_151892_signed
file misc.img alright modified to 1.37.405.1 from RUU_Buzz_Froyo_HTCCN_CHS_2.10.1400.3_Radio_13.53.5 5.24H
_3.35.19.25_release_151119_signed.exe
http://www.megaupload.com/?d=JPITE930