How to update android with OTA zip

What is OTA ?

To let android update go smooth on download servers, manufacturers roll out OTA updates only gradually to select regions and users and complete it over the course of up to one month. But of course, people like us don’t wait that long.

OTA updates can also be installed manually. Although manufacturers won’t give you this as a direct option, but users who receive the OTA updates often publicly share the .zip file of the update. That file is your ticket to install a OTA update manually.

So if you’ve the .zip file of the OTA update you wish to install, there are 2 methods to install it manually as instructed below.

#1: Install OTA update from recovery

Note: Custom recoveries like TWRP, CWM, PhilZ touch, etc. might not work. You’ll most probably need a stock recovery to install OTA updates manually.

  1. Download and transfer the OTA update’s .zip file to your Android device’s internal storage (don’t put it inside any folder).
  2. Boot your device into recovery mode.
    └ Once in recovery mode, use Volume buttons to navigate up and down between options and Power button to select an option.
  3. Select the “Apply update” or “Apply update from phone storage” option.
  4. Select the OTA .zip file you transferred in Step 1 above. and install it.
  5. Once installation is finished, select reboot from recovery main menu.

#2: Install OTA update via ADB Sideload

Note: Again, you need to be on stock recovery.Better flash previous stock rom by sp flash tool or bootloader.

  1. Setup ADB and Fastboot on your PC.
  2. Download the OTA update .zip file on your PC and rename it to ota.zip.
  3. Enable USB debugging:
    • Go to your phone’s settings » About phone » and tap “Build number” Seven times. This will enable Developer options on your phone.
    • Now go to Settings » Developer options » and tick the USB debugging check box.
  4. Connect your phone to PC.
  5. Now open the folder where you downloaded the OTA update .zip file and then open a command window inside the folder. To do that, do a “Shift + Right click” on any empty white space inside the folder and select “Open command window here” from the context menu.
  6. Now issue the following command into the command window to reboot your device into recovery mode:
     adb reboot recovery

    └ Check your phone’s screen, if it asks for “Allow USB debugging”, accept it by selecting OK/Yes.

  7. Once in recovery mode, use Volume buttons to navigate up and down between options and Power button to select an option.
  8. Select the “Apply update from ADB” option.
  9. Now issue the following command to finally begin installing the OTA:
    adb sideload ota.zip

    └ This will begin the OTA installation.

  10. Once the OTA zip is installed, select reboot from the main menu of recovery.

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