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  1. EVO 4G Froyo Downgrade
  2.  
  3. Preparation:
  4.  
  5. 1. Backup anything you need on your phone, as this procedure will erase everything that's not on the SDcard
  6. Use programs such as "MyBackup, MyBackup Pro, SMS Backup & Restore, Call Log Backup & Restore, etc.)
  7.  
  8. 2. Download and Install these HTC Drivers
  9. http://downloads.codefi.re/zanzibar/Tools/HTCDriver3.0.0.007.exe
  10.  
  11. 3. Download EVO-4G_4.67_Downgrade_Kit.zip
  12. http://downloads.codefi.re/zanzibar/Supersonic/EVO-4G_4.67_Downgrade_Kit.zip
  13.  
  14. 3a. 3a. If you don't have Windows, but instead have Mac or Linux,
  15. then Download the Mac/Linux Tools called MAC-Linux.zip
  16. http://downloads.codefi.re/zanzibar/Tools/MAC-Linux.zip
  17.  
  18. 4. Download a Froyo Based PC36IMG.zip - Original file name was: PC36IMG_SuperSonic_S_Sprint_WWE_3.70.651.1_Radio_2.15.00.11.19_NV_1.90_release_161482_signed.zip
  19.  
  20. http://downloads.codefi.re/zanzibar/Supersonic/3.70.651.1/PC36IMG.zip
  21.  
  22. ( mirrored here )
  23. http://goo.im/devs/zanzibar/Supersonic/3.70.651.1/PC36IMG.zip
  24.  
  25. ( also mirrored here, but must be renamed to PC36IMG.zip )
  26. http://d-h.st/NHo
  27.  
  28. 5. Create a new directory (folder) to work from.
  29.  
  30. 6. Extract all files from EVO-4G_4.67_Downgrade_Kit.zip into the newly created directory.
  31.  
  32. 6a. If necessary, extract the appropriate MAC or Linux files into the same directory.
  33. Be sure to chmod them to 755.
  34.  
  35. 7. Copy, but DO NOT EXTRACT PC36IMG_SuperSonic_S_Sprint_WWE_3.70.651.1_Radio_2.15.00.11.19_NV_1.90_release_161482_signed.zip into the same directory.
  36.  
  37. 8. Download the following file from the shortened URL, and place it in the same directory, as well.
  38. PC36IMG_SuperSonic_GB_Sprint_WWE_4.67.651.3_Radio_2.15.00.12.19_NV_2.33_Hboot_6.16.0420_CWM_5.0.2.2.zip
  39.  
  40. http://downloads.codefi.re/zanzibar/Supersonic/Custom/PC36IMG_SuperSonic_GB_Sprint_WWE_4.67.651.3_Radio_2.15.00.12.19_NV_2.33_Hboot_6.16.0420_CWM_5.0.2.2.zip
  41.  
  42. ( Mirrored here )
  43. http://tinyw.in/Supersonic420
  44.  
  45.  
  46. Filenames with MD5 Hashes
  47.  
  48. MD5: 2de1e312f3d3d5e7084058973c9348b7 - adb.exe
  49. MD5: 47a6ee3f186b2c2f5057028906bac0c6 - AdbWinApi.dll
  50. MD5: 5f23f2f936bdfac90bb0a4970ad365cf - AdbWinUsbApi.dll
  51. MD5: 6bbf05d97585c3c515bdb172eb9e7d12 - fastboot.exe
  52. MD5: 90d5f886a1650b5be31b01663d0c5667 - MAC-Linux.zip
  53.  
  54. MD5: 12c080ebe8546b54591109de191426f9 - flash_image
  55. MD5: ddf84c84b18cfab0453ca2fdd888b54e - mtd-eng.img
  56. MD5: 793e269f20a804e1abbb20a4369cc4d3 - tacoroot.sh
  57. MD5: 7056d42812aa5df03fcc8dddc2b64e85 - PC36IMG.zip
  58.  
  59. MD5: 3c1b499cd96258f10fb78c4858b6c0bb - PC36IMG_SuperSonic_GB_Sprint_WWE_4.67.651.3_Radio_2.15.00.12.19_NV_2.33_Hboot_6.16.0420_CWM_5.0.2.2.zip
  60.  
  61.  
  62. Prepare your phone
  63.  
  64. 1. Turn on "USB Debugging" on your phone: Menu -> Settings -> Applications -> Development
  65.  
  66. 2. Connect the HTC EVO 4G to your computer & set the connection mode on the phone to "Charge Only"
  67.  
  68.  
  69. Obtain Root Access
  70.  
  71. ( If you have Software Number 5.07.651.1 or higher, use http://htcdev.com/bootloader to unlock your phone.
  72. Then install a custom recovery, such as TWRP, and install root from within recovery. After you install root,
  73. you will need to relock your phone, by typing "fastboot oem lock" from command prompt. Continue to Step 5 )
  74.  
  75. ( If you do have Software Number 4.67.651.3 or lower, you need to do Steps 3 and 4. )
  76.  
  77. 3. Open a command prompt or terminal and navigate to your directory with adb and the other files.
  78.  
  79. 4. Enter the following commands (in bold):
  80.  
  81. adb devices
  82.  
  83. If you see your device listed, continue with the rest of this guide.
  84. Otherwise, verify you have properly installed the HTC Drivers.
  85. If you have used HTCdev to unlock your bootloader, and already have
  86. root access, then skip down to Step 5. If not, continue on.
  87.  
  88. adb push tacoroot.sh /data/local/
  89. adb shell chmod 755 /data/local/tacoroot.sh
  90. adb shell /data/local/tacoroot.sh --recovery
  91.  
  92. Your phone will reboot into recovery (It will look like a phone icon
  93. with a red triangle and an exclamation mark in the middle). Hit
  94. Volume-Up + Power and choose Reboot System now
  95.  
  96. Wait for system to reboot.
  97.  
  98. adb shell /data/local/tacoroot.sh --setup
  99.  
  100. Your phone will again reboot into recovery. Hit Volume-Up + Power
  101. and choose Reboot System now
  102.  
  103. Wait for system to reboot.
  104.  
  105. adb shell /data/local/tacoroot.sh --root
  106.  
  107. Your phone will again reboot. It may not boot fully this time, but
  108. you will hear the USB connection beeps, and adb will work fine.
  109.  
  110.  
  111. Downgrade
  112. ---------
  113. ( All Software Number versions continue here. )
  114.  
  115. 5. Now that you have root, flash a new downgradable misc partition, and downgrade.
  116.  
  117. adb push flash_image /data/local/
  118. adb push mtd-eng.img /data/local/
  119. adb shell
  120.  
  121. At this point your prompt should now be "# " - Type su if not.
  122.  
  123. cd /data/local/
  124. chmod 755 flash_image
  125. ./flash_image misc /data/local/mtd-eng.img
  126.  
  127. Verify there were no errors - otherwise abort
  128.  
  129. exit
  130. adb reboot oem-78
  131.  
  132. Your phone will reboot and say HTC in big gray letters
  133.  
  134. In the command prompt/terminal window, type the following:
  135.  
  136. fastboot erase cache
  137. fastboot flash zip PC36IMG.zip
  138.  
  139. Don't worry if the following shows up in your command window
  140.  
  141. FAILED (remote: 90 hboot pre-update! please flush image again immediately)
  142.  
  143. If so, you'll need to type the above command a 2nd time:
  144.  
  145. fastboot flash zip PC36IMG.zip
  146.  
  147. After a bunch of status messages appear on the screen, and you
  148. are returned to your prompt, continue
  149.  
  150. fastboot reboot
  151.  
  152.  
  153. When this has finished, your phone will be back to running Froyo, in a factory stock condition.
  154.  
  155. You are now ready to run unrEVOked v3.32 ( http://unrevoked.com/recovery/ ), and get radio S-OFF, the best S-OFF there is.
  156.  
  157. On freenode IRC, join: #unrEVOkedtest, and type the following command into the channel:
  158.  
  159. Here are the steps to run unrEVOked:
  160.  
  161. 1. If you are running Windows, you need to install the unrEVOked modified HBOOT Drivers.
  162.  
  163. Follow the directions Here (http://unrevoked.com/rootwiki/doku.php/public/windows_hboot_driver_install )
  164.  
  165. ( The driver needed can also be downloaded from: http://downloads.codefi.re/zanzibar/Tools/android-usb-driver.zip )
  166.  
  167. (Click Back When Done.)
  168.  
  169. 2. Boot your phone into running mode, and checkmark these two items:
  170.  
  171. Turn on Unknown sources (Menu -> Settings -> Applications)
  172. Turn on USB debugging. (Menu -> Settings -> Applications -> Development)
  173.  
  174. 3. Plug the phone directly into the computer's USB Port.
  175.  
  176. Do not use a USB hub, and plug it in the back if possible.
  177. Choose the option "Charge Only" on the phone, not "HTC Sync" or "Disk Drive".
  178.  
  179. 4. Download reflash-package from: http://www.unrevoked.com/recovery/
  180. ( You can download the Windows executable from: http://downloads.codefi.re/zanzibar/Tools/reflash_package_v3.32.exe )
  181. ( You can download the Linux executable from: http://downloads.codefi.re/zanzibar/Tools/reflash.tar.gz )
  182. ( You can download the Mac executable from: http://downloads.codefi.re/zanzibar/Tools/Reflash.dmg )
  183.  
  184. For Windows, run reflash-package.exe or reflash_package_v3.32.exe, as Administrator)
  185. For Linux/Mac, run reflash as root ( sudo ./reflash )
  186.  
  187. AFTER you complete the root and S-OFF, you should flash the file
  188.  
  189. PC36IMG_SuperSonic_GB_Sprint_WWE_4.67.651.3_Radio_2.15.00.12.19_NV_2.33_Hboot_6.16.0420_CWM_5.0.2.2.zip
  190.  
  191. This will give you latest version of Gingerbread, along with the newest radios on your EVO 4G. This also includes a custom HBOOT and ClockWorkMod recovery. The custom HBOOT will give you many extra fastboot commands, normally only available with an Engineering HBOOT.
  192.  
  193. Boot your phone fully, and do the following:
  194.  
  195. Turn on "USB Debugging" on your phone: Menu -> Settings -> Applications -> Development
  196.  
  197. In your command prompt, type this:
  198.  
  199. adb reboot oem-78
  200.  
  201. Your phone will reboot and say HTC in big gray letters
  202.  
  203. In the command prompt/terminal window, type the following:
  204.  
  205. fastboot erase cache
  206. fastboot flash zip PC36IMG_SuperSonic_GB_Sprint_WWE_4.67.651.3_Radio_2.15.00.12.19_NV_2.33_Hboot_6.16.0420_CWM_5.0.2.2.zip
  207.  
  208. Don't worry if the following shows up in your command window
  209.  
  210. FAILED (remote: 90 hboot pre-update! please flush image again immediately)
  211.  
  212. If so, you'll need to type the above command a 2nd time:
  213.  
  214. fastboot flash zip PC36IMG_SuperSonic_GB_Sprint_WWE_4.67.651.3_Radio_2.15.00.12.19_NV_2.33_Hboot_6.16.0420_CWM_5.0.2.2.zip
  215.  
  216. After a bunch of status messages appear on the screen, and you are
  217. returned to your prompt, continue
  218.  
  219. fastboot reboot
  220.  
  221.  
  222. When this has finished, your phone will be back to running 4.67.651.3, with all the latest radios, etc.
  223.  
  224. The final step will be to do the following:
  225.  
  226. Download Superuser-3.0.7-efghi-signed.zip (md5: fc462fa0630379edbe10006b1d19d9b1). Do not extract any files from the zipfile. Place this zipfile on your sdcard, and install it from within ClockWorkMod recovery.
  227.  
  228. The file is located here - http://downloads.codefi.re/zanzibar/Tools/Superuser-3.0.7-efghi-signed.zip
  229.  
  230. Good Luck!
  231.  
  232. If this Guide has helped you, please consider donating : http://tinyw.in/evo4gdowndonate
  233.  
  234. (c) 2012-2015
  235.  
  236. Page Created by Zanzibar/ZanzDroid (2012-03-22) (Updated on 2012-04-11, 2013-09-25, 2014-09-12, Last updated 2015-01-06)
  237.  
  238. Thanks to hyuh for proof-reading, and advice.