While traditional custom ROMs (like LineageOS) are not widely available, most users "mod" the A105 through and Android system-level optimizations to solve its primary weakness: poor battery life . The Custom Firmware Situation
Most CFW for the A105 includes pre-rooted kernels (Magisk). This allows for advanced tools like ViPER4Android for system-wide EQ and Kernel Adiutor to underclock the CPU to save battery. sony nw-a105 custom firmware
Since you can't flash a custom OS, "modding" an A105 involves optimizing the existing Android environment: Battery & Performance Optimization While traditional custom ROMs (like LineageOS) are not
, whereas the moddable models use a proprietary Sony Linux-based OS. MrWalkman - for music Since you can't flash a custom OS, "modding"
User Testimony: "After flashing Walkman One, my A105 sounded darker, with more bass weight. The soundstage felt less 'digital' and more 'liquid.' The battery still isn't great, but it lasts 2 hours longer because Google isn't spying on me."