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con frp de octoplus sale solo es cogemos la marca zte y el modelo a520 le damos en frp y conectamos apretando el volumen bajar y cable usb y es todo probado
Platform: ZTE
Selected model: A520
Please, power phone OFF, press and hold "Vol-" button and connect USB cable.
Searching for a phone. Please wait...
Found phone on COM32
Detecting Chip Version...
HW Chip: MT6735: 0335.0000
HW Version: 8A00.CB00.0000.0000
Connecting...
Brom Version: 05
BootLoader Version: FE
Sending auth...
Searching Download Agent...
Selected DA: MTK_AllInOne_DA_v3.3001.2017-09-06.13:15_388644, n.10
Sending Download Agent...
DA sent successfully
Initializing DA...
Synchronizing with DA...
NAND Flash: not installed
eMMC Flash: .90014A48.38473461.32A520AB.644611C5
eMMC Flash: Hynix: H8G4a2
DA ver: 4.2.9B
Initializing Memory Flash..
Sending BootLoader Info...
Initialization successfully completed
Sending loaders...
Loader send successfuly.
Reading Flash Info...
EMMC rpmb size: 4 Mb
EMMC boot1 size: 4 Mb
EMMC boot2 size: 4 Mb
EMMC gp1 size: 0 Mb
EMMC gp2 size: 0 Mb
EMMC gp3 size: 0 Mb
EMMC gp4 size: 0 Mb
EMMC user area size: 7456 Mb
Internal RAM size: 128 Kb
External RAM size: 1024 Mb
Reading partition...
Reading info...
Brand: ZTE
Model: BLADE A520
Device: P637F10
Platform: mt6737m
Android version: 7.0
Display ID: TEL_MX_BLADE_A520V1.0.0
Searching for signatures...
Resetting FRP lock..
FRP lock is successfully reseted!
Backup saved as ZTE_A520_24-06-2018_16-15-47.dump file
Performed by 1.3.0.0 Software version.
Platform: ZTE
Selected model: A520
Please, power phone OFF, press and hold "Vol-" button and connect USB cable.
Searching for a phone. Please wait...
Found phone on COM32
Detecting Chip Version...
HW Chip: MT6735: 0335.0000
HW Version: 8A00.CB00.0000.0000
Connecting...
Brom Version: 05
BootLoader Version: FE
Sending auth...
Searching Download Agent...
Selected DA: MTK_AllInOne_DA_v3.3001.2017-09-06.13:15_388644, n.10
Sending Download Agent...
DA sent successfully
Initializing DA...
Synchronizing with DA...
NAND Flash: not installed
eMMC Flash: .90014A48.38473461.32A520AB.644611C5
eMMC Flash: Hynix: H8G4a2
DA ver: 4.2.9B
Initializing Memory Flash..
Sending BootLoader Info...
Initialization successfully completed
Sending loaders...
Loader send successfuly.
Reading Flash Info...
EMMC rpmb size: 4 Mb
EMMC boot1 size: 4 Mb
EMMC boot2 size: 4 Mb
EMMC gp1 size: 0 Mb
EMMC gp2 size: 0 Mb
EMMC gp3 size: 0 Mb
EMMC gp4 size: 0 Mb
EMMC user area size: 7456 Mb
Internal RAM size: 128 Kb
External RAM size: 1024 Mb
Reading partition...
Reading info...
Brand: ZTE
Model: BLADE A520
Device: P637F10
Platform: mt6737m
Android version: 7.0
Display ID: TEL_MX_BLADE_A520V1.0.0
Searching for signatures...
Resetting FRP lock..
FRP lock is successfully reseted!
Backup saved as ZTE_A520_24-06-2018_16-15-47.dump file
Performed by 1.3.0.0 Software version.
