The Allwinner A133 is a quad-core ARM Cortex-A53 processor designed for entry-level to mid-range Android tablets. Due to the fragmented nature of the Android tablet market, there is no single "official" source for A133 firmware. Instead, firmware is highly specific to the (the "Board ID"). This report outlines how to identify the correct firmware, sources for updates, and the installation process.
If you have custom secure boot keys fused into your A133, flashing this firmware will likely the device unless you disable the "secure storage" erase flag. Always check your keybox compatibility before flashing. allwinner a133 firmware updated
Unlike major smartphone brands (Samsung, Xiaomi), Allwinner does not distribute Over-the-Air (OTA) updates directly to end-users. The Allwinner A133 is a quad-core ARM Cortex-A53
# Set up network setenv ipaddr 192.168.1.100 setenv serverip 192.168.1.10 sources for updates