vivo v15 1819 imei repair help

[raskal]

Please, put your device in OFF mode and insert USB cable
Waiting for MTK port: 134
Driver Info: MediaTek Inc.
Driver version: 3.2.0.0
Driver date: 1-22-2016
HW Chip: MT6771
HW version: ca00
SW version: 00
HW sub version: 8a00
SEC_CFG_SBC_EN: true
SEC_CFG_SLA_EN: false
SEC_CFG_DAA_EN: true
MEID: 0x94727CF99618DCDB00A641715661D713
Send DA SYNC signal: OK
Setup device enviroment: OK
Receive DA SYNC signal: OK
USB_SPEED: HIGH-SPEED
Device mode: preloader
Send 2nd DA: ...
waitt wait then failed