Normal direct unlock didn't work so googled and found youtube video by using simlock backup from mobicel rio ss then unlocked set.Had to save original imei before operation and was successful.
ACTION: Direct Unlock
Detecting phone, wait...
Using connection mode 1
Detected: SPRD U2S Diag (COM4)
Platform Version: MOCORTM_17C_W18.23.4_P22_Debug
Project Version: pike2_pub
BASE Version: FM_BASE_17C_W18.23.4_P22
HW Version: sc7731e_modem
04-23-2019 15:30:22
Build number: B53pro_CMCC_MTN_ZM_V83_20201119
EMMC DDR SIZE :4MB+512MB
UID: T3FX39_16_27_51
IMEI 1: 866141049016772
IMEI 2: 866141049016780
IMEI 3: 867400020316638
IMEI 4: 867400020316646
BT: F848FDF07B31
WIFI: F848FDF0CAE1
Reading simlock backup, wait....
Saved to: C:\nckbox\spreadtrum_module\spreadtrum_module\diag _nvram_backup\B53pro_CMCC_MTN_ZM_V83_20201119_8661 41049016772__diag_simlock_nvram_backup_1.tar
Simlock Status:
SIMLOCK: ACTIVE
NETWORK SUBNET: INACTIVE
SP LOCK: INACTIVE
CORPORATE: INACTIVE
USER LOCK: INACTIVE
[2]Simlock Type: 9 9
Sim 1 Unlock Code: 51160192
Sim 2 Unlock Code: 73148979
Warning, this is factory key, some opperators can modify factory key.
Writing simlock...
Writing simlock ok
Done.
Action: REPAIR.
Detecting phone, wait...
Detecting phone, wait...
Using connection mode 1
Detected: SPRD U2S Diag (COM4)
Platform Version: MOCORTM_17C_W18.23.4_P22_Debug
Project Version: pike2_pub
BASE Version: FM_BASE_17C_W18.23.4_P22
HW Version: sc7731e_modem
04-23-2019 15:30:22
Build number: B53pro_CMCC_MTN_ZM_V83_20201119
EMMC DDR SIZE :4MB+512MB
UID: T3FX39_16_27_51
IMEI 1: 866141049016772
IMEI 2: 866141049016780
IMEI 3: 867400020316638
IMEI 4: 867400020316646
IMEI 1 to write: 866141049016772
IMEI 2 to write: 866141049016780
IMEI 3 to write: 867400020316638
IMEI 4 to write: 867400020316646
Write IMEI Done.
Done.
Thanks to Tim for the help a fellow zimbabwean
