ERROR fILE adbd not install With MTK droid tool v.2.5.3
Solution
If it persists then
Download ADBD Insecure apk @http://ouo.io/2COo3t
Install it on the phone and launch
Tick Enable insecure adbd
Re-launch MtK droid tools
-Link MTK droid tool v.2.5.3 http://ouo.io/X845j