cam-l21 after write nv file imei and basband unkwon

Looking for a device in fastboot mode

Device found: LHTDU16818006667


2/5/2019 4:51:13 AM Starting to write device in FASTBOOT mode...
File to update: CAM-L21_NV_partitions_backup.dgtks

Device found: LHTDU16818006667

IMEI: 864591032437983
Build number: :CAM-L21C185B162
Product model: CAM-L21
Batery state: 3057mv

Erasing modemlog partition
ERASE partition modemlog ...FAILED

Erasing modemlog partition
Partition modemlog erased

Erasing modemnvbkup partition
Partition modemnvbkup erased

Erasing modemnvreserved partition
Partition modemnvreserved erased

Erasing modemnvm1 partition
Partition modemnvm1 erased

Erasing modemnvm2 partition
Partition modemnvm2 erased

Erasing modemnvm3 partition
Partition modemnvm3 erased

Writing modemlog partition with file modemlog_backup.img
modemlog partition UPDATE ...OK

Writing modemnvbkup partition with file modemnvbkup_backup.img
modemnvbkup partition UPDATE ...OK

Writing modemnvreserved partition with file modemnvreserved_backup.img
modemnvreserved partition UPDATE ...OK

Writing modemnvm1 partition with file modemnvm1_backup.img
modemnvm1 partition UPDATE ...OK

Writing modemnvm2 partition with file modemnvm2_backup.img
modemnvm2 partition UPDATE ...OK

Writing modemnvm3 partition with file modemnvm3_backup.img
modemnvm3 partition UPDATE ...OK
Software written

2/5/2019 4:51:48 AM Writing device finished OK