GSM-Forum - zte blade a31 unlock failed

First 16 bytes from public rsa key.
B8928F81E592DF02E227A84968366708
***************
Phone Storage: EMMC
SELECTED: SC9863A_EMMC_ZTE([sign 1]A10+)
ACTION: SimUnlock
Loader format:NEW
Start Detect phone.
Phone must be off with battery inside.
Long press "VOL -"+ "VOL +" key while inserting usb cable.
Keep key untill boot complete.
Detected: SPRD U2S Diag (COM51)
Sending loader, keep boot key untill loader start.
Loader OK: Spreadtrum Boot Block version 1.1
Changing bautrate OK.
Send Second Loader.
New flash metod detected.
Read partition info is supported by loader.
UID: TH4V03_5_28_10
***************
[S]Manufacturer: ZTE
[S]Brand: ZTE
[S]Device: Z5351T
[S]Model: Blade A31
Build ID: RP1A.201005.001
CPU arhitecture: armeabi-v7a
Build product name: s9863a1h10_go_32b
Build description: s9863a1h10_go_32b_general-user 11 RP1A.201005.001 20211215.155901 release-keys
Product name: Z5351T
SW Version: TLS_AU_Z5351TV1.0.0B14
Board: s9863a1h10_go_32b
Build Id: RP1A.201005.001
Android Release: 11
Android Version: Blade A31_T02
Security patch: 2021-12-05
CPU NAME: SC9863A
NV partition: l_fixnv1
IMEI 1: 869730050212374
IMEI 2: 867400020316620
IMEI 3: 867400020316638
IMEI 4: 867400020316646
Simlock Type: 4

Simlock Status:
SIMLOCK: ACTIVE
NETWORK SUBNET: ACTIVE
SP LOCK: INACTIVE
CORPORATE: INACTIVE
USER LOCK: INACTIVE
[4]Simlock Type: 0 0
NV partition: l_fixnv2_a
Backup saved to: C:\Users\USER\Documents\spreadtrum_module\flashmod e_nvram_backup\SC9863A_Blade_A31_T02_8697300502123 74_867400020316620_l_fixnv1_nvram_backup_2.tar
Testing key 1
Testing key 2
Testing key 3
Sim unlock and repair imei is supported for this phone.
Integrity seems ok, proceed with unlock....
Start write unlock, wait...
Wrong responce.
[can take 0-10 sec]Wait untill phone restart.
Exe version: Avengers Spreadtrum Module 2.1.7
Log saved:
C:\Users\USER\Documents\spreadtrum_module\Saved_Lo gs\Blade_A31_T02_869730050212374_867400020316620_s im_unlock_phone_2.txt
Total Time: 00:00:36
Done.