Frp Zte A520 seguridad del 05 Agosto 2018,

[servergsm]

1. SELECCIONAR EL MODELO DE ZTE A520 V2
2. PRECIONAR RESET FRP
3. PRECIONAR VOL -
4. CONECTAR EL TELEFONO APAGADO CON LA BATERIA
Y LISTO FRP ELIMINADO

Este es mi log que hice hoy, con el parche de seguridad del 05 Agosto 2018, proceso exitoso en muy poco tiempo:

Welcome to Octoplus FRP Tool v.1.5.8.0
Platform: ZTE
Selected model: A520 V2
Please, power phone OFF, press and hold "Vol-" button and connect USB cable.
Searching for a phone. Please wait...
Found phone on COM10
Detecting Chip Version...
HW Chip: MT6737: 0335.0000
HW Version: 8A00.CA00.0000.0000
Connecting...
Brom Version: 05
BootLoader Version: FE
Sending auth...
Searching Download Agent...
Selected DA: MTK_AllInOne_DA_v3.3001.2018-11-07.23:57_458956, n.10
Sending Download Agent...
DA sent successfully
Initializing DA...
Synchronizing with DA...
NAND Flash: not installed
eMMC Flash: .15010046.4E36324D.420353DD.9A97A59F
eMMC Flash: Samsung: FN62MB
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: 0 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: CLR_DO_BA520_V8.0
Searching for signatures...
Resetting FRP lock..
FRP lock is successfully reseted!
Backup saved as ZTE_A520 V2_11-01-2019_14-43-29.dump file
Performed by 1.5.8.0 Software version.

Solo seguir los pasos que indica nuestro amigo