Vivo Y83 Pro IMEI Repair Fail…

hello team
I Have Vivo Y83 Pro With Default IMEi(865407010000009) I Want To repair..I Use UMT MTK Vivo Meta Mode Method But Not success ,tool Showing Success log But Handset In Same Condition..

Log:

Operation : IMEI Reapir [META (Vivo)]
Checking for existing META ports…
No existing META port found.
Hold VOL UP + DOWN and connect USB Cable.
Some phone may have different key combination for BROM mode.
Waiting for device in BROM mode…
Port: COM5
Port Name: MediaTek USB Port_V1632 (COM5)
Path: \?usb#vid_0e8d&pid_0003#6&1d7e6c28&0&3#{86e0d1e0-8089-11d0-9ce4-08003e301f73}
Chipset: 0x0766, [MT6765]
Hardware Info: 0x8A00, 0xCA00, 0x00
SecureBoot: True
SLA: False
DA Auth: True
Disabling WatchDog…
– Success
Sending Payload data…
– Payload sent
Initiating Control Transfer…
– Done
Waiting for result…
– Result: 0xA1A2A3A4
Disable Auth Success
Found MediaTek USB Port_V1632 (COM5) on COM5
Device Path : usbvid_0e8d&pid_0003&rev_0100
Mode : BROM
Rebooting to META mode…
Waiting for phone in META mode…
Found MediaTek USB VCOM (Android) (COM34) on COM34
Device Path : \?usb#vid_0e8d&pid_200e#lf9dduwg6ly99slb#{a5dcbf 10-6530-11d2-901f-00c04fb951ed}
Configuring Communication Channel…
Reading phone information…
CPU : MT6765
SW Ver. : MOLY.LR12A.R2.MP.V23.P79
HW Ver. : BBK_O1MP6_K62V1_64_BSP_HW
IMEI1 : 865407010000009
IMEI2 : 865407010000009
Reading data from phone…
Repairing IMEI1 to 86993603…
Repairing IMEI2 to 86993603…
Syncing Data…
Operation Finished.
[UltimateMTK Ver. 4.0]

Some More Thinks i tried
1. flashed Phone In "Firmware upgrade" Mode Then Tried Again With Umt But same log say success but phone has default imei.
.
2. flashed Phone In "Download Only" Mode Then Tried Again With Umt But same log say success but phone has default imei..

3. flashed Phone In "Format And Download" Mode Then Tried Again With Umt But same log say success but phone has default imei..

4.Format NVram/Data getting error

log:
Operation : Format NVRAM/NVDATA
Waiting for Phone in Flash Mode…
Connect Power Off phone within 30 secs…
Port : MediaTek USB Port_V1632 (COM5)
Connected to BROM.
Sending Download Agent…
connect DA end stage: 2, enable DRAM in 1st DA: 0
Failed to Connect DA: STATUS_PRELOADER_INVALID(-1073545212)
Disconnect cable and Power ON phone.
Please check if correct Platform/DA is selected
Disconnect Battery/Cable and Power On Phone.
[UltimateMTK Ver. 4.0]

5.Tried latest xiaomi method but same

log:
Operation : IMEI Reapir [Xiaomi Method]
Checking for existing META ports…
No existing META port found.
Hold VOL UP + DOWN and connect USB Cable.
Some phone may have different key combination for BROM mode.
Waiting for device in BROM mode…
Port: COM5
Port Name: MediaTek USB Port_V1632 (COM5)
Path: \?usb#vid_0e8d&pid_0003#6&1d7e6c28&0&3#{86e0d1e0-8089-11d0-9ce4-08003e301f73}
Chipset: 0x0766, [MT6765]
Hardware Info: 0x8A00, 0xCA00, 0x00
SecureBoot: True
SLA: False
DA Auth: True
Disabling WatchDog…
– Success
Sending Payload data…
– Payload sent
Initiating Control Transfer…
– Done
Waiting for result…
– Result: 0xA1A2A3A4
Disable Auth Success
Found MediaTek USB Port_V1632 (COM5) on COM5
Device Path : usbvid_0e8d&pid_0003&rev_0100
Mode : BROM
Rebooting to META mode…
Waiting for phone in META mode…
Found MediaTek USB VCOM (Android) (COM34) on COM34
Device Path : \?usb#vid_0e8d&pid_200e#lf9dduwg6ly99slb#{a5dcbf 10-6530-11d2-901f-00c04fb951ed}
Configuring Communication Channel…
Reading phone information…
CPU : MT6765
SW Ver. : MOLY.LR12A.R2.MP.V23.P79
HW Ver. : BBK_O1MP6_K62V1_64_BSP_HW
IMEI1 : 865407010000009
IMEI2 : 865407010000009
Reading data from phone…
– Done!
Repairing IMEI2 as 869936…
– Success!
Syncing Data…
– Success!
Operation Finished.
[UltimateMTK Ver. 4.0]

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