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| laptopwiki:guides:os:android:lenovo_p11_gen2_downgrade_to_android12 [05/04/2024 20:05] – created dustojnikhummer | laptopwiki:guides:os:android:lenovo_p11_gen2_downgrade_to_android12 [06/04/2024 09:02] (current) – [Now the hard part] dustojnikhummer | ||
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| ====== Downgrade Lenovo P11 Gen 2 TB350XU from Android 13 to Android 12L ====== | ====== Downgrade Lenovo P11 Gen 2 TB350XU from Android 13 to Android 12L ====== | ||
| - | ===== Disclaimed | + | ===== Disclaimer |
| * Only do at your own risk | * Only do at your own risk | ||
| * I'm not responsible for voided warranties or bricked devices | * I'm not responsible for voided warranties or bricked devices | ||
| Line 12: | Line 12: | ||
| * Windows PC | * Windows PC | ||
| ===== Where to get ROM ===== | ===== Where to get ROM ===== | ||
| + | * Avoid sites like https:// | ||
| + | * Their downloads are paid and there is no guarantee of files working | ||
| + | * Stick to lolinet.com and needrom.com | ||
| * You will need both of these | * You will need both of these | ||
| * TB350XU_S130348_240118_ROW.7z [[https:// | * TB350XU_S130348_240118_ROW.7z [[https:// | ||
| - | * Lenovo-Tab-P11-2nd-Gen-TB350XU-23.zip (TB350XU_S020273_230717_ROW) [[https:// | + | * Lenovo-Tab-P11-2nd-Gen-TB350XU-23.zip (TB350XU_S020273_230717_ROW) [[https:// |
| + | ===== Flashing process ===== | ||
| + | - Turn off your tablet | ||
| + | - Extract both ROM files | ||
| + | - Extract SPFlashTool | ||
| + | - We will want to flash the TB350XU_S020273_230717_ROW, | ||
| + | - Copy **MT6789_Android_scatter.txt** and **MT6789_Android_scatter.xml** and **CheckSum_Generate.exe** TB350XU_S130348_240118_ROW folder to TB350XU_S020273_230717_ROW\image | ||
| + | - Run the **CheckSum_generate.exe** file | ||
| + | - Open SPFlashTool in MTK_flash_tool_V6\MTK_flash_tool_V6\flash_tool.exe | ||
| + | - Into Download-XML load TB350XU_S020273_230717_ROW\image\download_agent\**flash.xml** | ||
| + | - If you generated the Checksum properly the ROM should load | ||
| + | - From the dropdown select **Download Only** | ||
| + | - DO NOT select Format All + Download, you might lose your IMEI number | ||
| + | - Click the Download button | ||
| + | - Connect you tablet (while OFF) | ||
| + | - The flash should take about 3-4 minutes | ||
| + | ==== Now the hard part ==== | ||
| + | * The tablet acts like it's bricked, it isn't responding to inputs, charger etc | ||
| + | * Force Shutdown the tablet. Screen is blank, but it isn't off. | ||
| + | * Power + Volume Down is Force Shutdown (on all other Android devices I have had it was just Hold Power), so hold that for about 30 seconds. | ||
| + | * Then turn it on with power button (or plug in charger and see if the Charging screen pops up) | ||
| + | * If it starts bootlooping (Lenovo Android logo pops up, then it reboots), hold Power and Volume up. | ||
| + | * If you get a Fastboot prompt, you are okay, you didn't hard brick the tablet | ||
| + | * Turn it off by holding power button for 20 seconds or so | ||
| + | * Try the flash again | ||
| + | * I'm mentioning because this happened to me. Bootloop and a second flash = working Android 12 Tablet. | ||
| + | * If recovery pops up instead, use that to format the tablet | ||
| + | * Reboot | ||
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