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hola amigos, la liberacion de m4 ss4457 la hice por medio del procesador 6737m modulo mtk en nck, lectura de codigos en modo flash, luego ingresan *#45362718090#* en el teclado y dan desbloquear ingresan el codigo numero 1 y listo
Selected connection metod: FLASH Mode
Exe version: NCKBox AndroidMTK 1.8.9.1
Selected model: MT6737M
Reinsert phone battery.
Battery must be charged.
Phone must be off with battery inside.
Please insert USB cable now...
Detected : MediaTek PreLoader USB VCOM (Android) (COM22)
Boot mode: Preloader
Using Algo 2.
Phone detected...Please wait
Sending DA agent, please wait...
----------------------------------------------------
BaseBand CPU :MT6737M
BaseBand CPU Secure Version : FF
BaseBand CPU Bootloader Version : 01...
Selected connection metod: FLASH Mode
Exe version: NCKBox AndroidMTK 1.8.9.1
Selected model: MT6737M
Reinsert phone battery.
Battery must be charged.
Phone must be off with battery inside.
Please insert USB cable now...
Detected : MediaTek PreLoader USB VCOM (Android) (COM22)
Boot mode: Preloader
Using Algo 2.
Phone detected...Please wait
Sending DA agent, please wait...
----------------------------------------------------
BaseBand CPU :MT6737M
BaseBand CPU Secure Version : FF
BaseBand CPU Bootloader Version : 01...
