Có cách up rom cho O 2 2 bằng SD card, có hướng dẫn nhưng E không biết làm thế nào cả
Bác nào rành kỹ thuật dịch ra hộ E tý
perlscript to assist in creating sd card images
        * sdtool.pl source
        *
          first create an sdcard from the bootloader, and extract the header from that card with:
              psdread -3 0 0x200 sd.hdr
          this file is specific to the sd-card, and the bootloader version that it was created with.
        *
          use as follows:
              perl sdtool.pl -rm 0x80040000:sd.nb1:0:0x1ec0000 -wi sd.img -rh sd.hdr
        *
          save the image to sdcard with:
              psdwrite -3 sd.img
        * HimalayaSDcardLayout describes the layout of sd-cards
example how to create an sdcard with both extended rom upgrade, and os update
    sdtool -rm 0x70010000:ms_.nba:0x40 -rm 0x80040000:nk.nba:0x40040:0x1ec0000 -wi sd.img -rh sd.hdr
example how to extract the contents of an sd-card
    sdtool -ri sdrawimage.img -wm sd
will create files with prefic 'sd', followed by the offset for each section found on the sdcard.
note: to create a multi section sdcard from the bootloader, see HimalayaBootloaderSdCardFlashing.
example how to flash the extended rom and radio Simultaneously
in the HimalayaBootloader:
first copy the first 3 M of the radio to sd
    d2s 60000000 00300000
   SD:Waiting for card insert.........
   CMD3 for SD, it's OK, ready to get RCA from response.
   SD

etected one card
   SD:ready for transfer OK
   Total card size=1D30000ze=0
   ****************
   Store image to SD/MMC card successful.
and now append the extended rom to the sd card
    d2s 70080000 01000000 sd a
   SD:Waiting for card insert.........
   CMD3 for SD, it's OK, ready to get RCA from response.
   SD

etected one card
   SD:ready for transfer OK
   Total card size=1D30000ze=0
   DOCInfoTableinitHW+
   Binary0:dwSize=80000
   BINFS0:dwSize=0
   FAT0:dwSize=1000000
   FAT1:dwSize=EA0000
   All:dwSize=1F20000
   ****************************************************************
   Store image to SD/MMC card successful.
then when you insert the sdcard, and then boot into bootloader mode, the following happens:
on the display, you see a message 'sections=2', and 'press power to flash'. after pressing the power button, you see the following output on the serial port:
   Flash ROM mapping total size = 2000000
   Flash ID = 89,8802
   Trumbull INTEL StrataFlash 128 Mbit MEMORY (K3/k18) found
   dwROMTotalSize = 2000000
   wTotalChip = 2
   HTC Integrated Re-Flash Utility for bootloader Version:1.29  HIMALAYAS PVT version:1.02
   MainBoardID = 4
   Built at: Sep 24 2003 18:17:06
   Copyright (c) 1998-2002 High Tech Computer Corporation
   Turbo Mode Frequency = 398 MHz
   Run Mode Frequency = 199 MHz
   Memory Frequency = 100 MHz
   SDRAM Frequency = 100 MHz
   Main=0x90035EE4
   LCD Power ON!
   ATI Chip Id=0x56441002
   DOCInfoTableinitHW+
   Binary0:dwSize=80000
   BINFS0:dwSize=0
   FAT0:dwSize=1000000
   FAT1:dwSize=EA0000
   All:dwSize=1F20000
   SD:Waiting for card insert.........
   CMD3 for SD, it's OK, ready to get RCA from response.
   SD

etected one card
   SD:ready for transfer OK
   Total card size=1D30000ze=0
   Radio flash Updating...
   ************
   SD/MMC download to ROM is successful!
   DOCInfoTableinitHW+
   Binary0:dwSize=80000
   BINFS0:dwSize=0
   FAT0:dwSize=1000000
   FAT1:dwSize=EA0000
   All:dwSize=1F20000
   DOC flash Updating...
   ****************************************************************
   SD/MMC download to ROM is successful!
now both the radio and extended rom are upgraded!