You cannot install TWRP on a locked bootloader. This usually involves a manufacturer-specific process (e.g., Mi Unlock for Xiaomi or fastboot oem unlock for Pixel/Nexus).
Released as a maintenance update to the 3.5 series, version 3.5.2-0 focused heavily on stability and fixing bugs introduced by the major 3.5.0 overhaul. Key highlights include: Twrp Recovery 3.5.2-0 Download
TWRP Recovery 3.5.2-0: The Ultimate Custom Recovery Guide For Android enthusiasts, the journey into customization always begins with a custom recovery. remains the gold standard in this space, and version 3.5.2-0 stands as a pivotal update that bridged the gap between legacy Android versions and the newer partitioning systems found in modern devices. You cannot install TWRP on a locked bootloader
Open a command prompt or terminal on your computer and navigate to the folder where you downloaded the TWRP Recovery 3.5.2-0 file. Type the following command to flash TWRP Recovery: Key highlights include: TWRP Recovery 3