818 million refresh and original system recovery strategy

Yundun 818 flash and original system recovery strategy

I. required tools:

1. Synchronize the USB data cable

2. Card Reader

3. SD card

2. Required Software

1. romupdate (used to extract the 818 original Rom, which is also called mtty. The software must be copied to the C root directory)

2. ntrw (used to read and write ROM image files between the card reader and PC. The software must be copied to the C-drive root directory)

3. hexedfull (used to change the New rom to available ROM)

Step 3:

(1) back up the original Rom within 818.

This process is required because the source Rom must start with the source Rom, and only the original Rom customer service will be guaranteed.

1. Open the ActiveSync software on your computer, click "file" and "connection settings" in sequence, and cancel the check box before "Allow access through USB. For security, 818-side ActiveSync also cancels the USB connection. If you do not cancel the USB connection to the romupdat software, you cannot find 818 and back up the Rom.

2. After completing the above operations, switch 818 to the boot interface. Press the power supply and photo key in a long way, and use the soft opening hole of the pen strokes to start the soft-start. 818 the boot interface will be displayed; connect the computer with a USB cable, and then insert the SD card to 818.

3. Open the romupdat software. Then, you will see an open port setting window. Select USB in the port option and click OK. Then, enter "D2S" in the pop-up window and press Enter, at this time, romupdat starts to back up your 818 original Rom to the SD card. During the backup process, the 818 screen backlight will be disabled, but the screen will still be turned on, on the screen, you can see a scroll bar counting hundreds of percent. When it reaches, there will be a checksum process, patience, and so on until there is checkcum OK. Now there is a 818 original Rom backup in your SD card.

4. Insert the SD card into the card reader connected to the computer. A warning is displayed, asking if the SD card is not formatted. Click "no" (otherwise, the system will be abandoned and you need to back up the card again ), enter cmd in start and run on the PC to open the DOS system.

5. Change the path for opening the DOS system to the C root directory (the method is to input "CD .. or directly enter "CD \"), and then enter "ntrw read 818t. nb1 X: "command to write the ROM in the SD card to the C drive root directory (X: The drive letter displayed by the card reader on the PC, 818t. nb1 is the ROM file name, which can be any name, And the suffix nb1 can also be left blank. After the copy process from SD to PC ends, ntrw will receive an error warning. Find the backup Rom in the root directory of drive C and copy it to another folder. Make sure that the backup Rom is not damaged or changed (otherwise, it will not be flushed back ). In this way, the backup Rom under the C-drive root directory can be used to do the brushed Rom.

(2) Prepare a brushed Rom

1. Use the hexedfull software to open the original Rom backup under the C-drive root directory, select the first 416 bytes, right-click and then click Copy.

2. Use the hexedfull software to open the new ROM, select the same first 416 bytes, right-click and paste it. Save the modified ROM as a new file. This file is the ROM that can be flushed.

3. Write the modified Rom to the SD card. Save the modified Rom to the root directory of the C drive, and input "ntrw write 818c. nb1 X: "(X: Still the drive letter of the SD card, 818c. nb1 is the file name of the modified ROM you just saved. And other software to write the SD card.

(3) Flash brush.

Insert the SD card of the RoM into 818, and switch the SD card of 818 to the boot interface again. On the screen without backlights, You can see serial. After a while, you can see Press power to flash. Press the power key at this time, the same inverted count, the same inverted hundred percent will be checksum, usually there will be a Checksum failed-flashing failed error prompt, don't worry about him, soft-start once 818, brush complete.

Radio Upgrade Method

First, back up your system on the card. Radio upgrade does not involve the operating system. Therefore, Sprite backup can be used to back up the system. After radio upgrade is complete, it can be restored directly. If you do not need backup, you can open "Active Sync" on your computer and click "file"> "connection settings"> "cancel the check box before allowing USB connections. Press the power key and camera key at the same time, and then press soft start with the pen to enable PPC to enter the serial state, link PPC and PC with a synchronization line, open the downloaded 818 radio 1.12folder, double hit maupgradeut_noid.exe, click Next to start the upgrade.

Unplug the synchronization line, press the power key, and then press the soft-start key to start the synchronization line. The entire upgrade process is completed.

818 original Rom restoration method

1. Add the original Rom into the SD card and insert the SD card into the 818. If you want to format the card, click "no". Otherwise, all the work will be done!

2. Press and hold the power supply and camera keys of 818, and Click Reset (Soft Start) with the pen, after the USB 818 is released, it enters the serial communication status (enable "Active Sync" on the computer in advance, and click "file"> "connection settings"> "cancel the check box before allowing USB connections ), after a while, the prompt that you press the power source to continue to fl the Rom will appear. If no prompt appears, you need to press the camera key and then tap the power switch to start flrom the Rom.

3. After the refresh is complete, you can use the soft boot!