SLA is a proprietary security protocol implemented by MediaTek. Think of it as a digital bouncer at the entrance of the phone’s preloader. When SP Flash Tool attempts to communicate with the device in BootROM mode, the phone demands a valid cryptographic signature. Without the correct, device-specific key, the phone refuses to open its memory interface for writing.
The "MTK Auth Disable-SLA DAA Error" is not a bug. It is a feature. A terrifyingly successful one. mtk auth disable-sla daa- error
This is the gold standard. You need a that has its SLA checks neutered. SLA is a proprietary security protocol implemented by