Mt7-L09 IMEI repai failed

Hi.
i replaced Mt7-L09 emmc but cannot repair imei.
I've tried with locked and unlocked bootloader and different firmwares but always get this error.


Chimera Mobile Phone Utility version: 21.25.1302 @ 2019-05-29


Repairing IMEI(s)...
Factory reset notify window was accepted.
Searching for manufacture port...
Testing connection...
Checking IMEI(s)...
Authenticating...
This may take a while.
Be patient! Do NOT disconnect the phone!
Checking IMEI(s)...
Old IMEI1:: 86******
New IMEI1:: 86******
Identifying...
This may take a while.
Be patient! Do NOT disconnect the phone!
Failed to get identification credentials from the device
Retry 2/5
Failed to get identification credentials from the device
Retry 3/5
Failed to get identification credentials from the device
Retry 4/5
Failed to get identification credentials from the device
Retry 5/5
Failed to get identification credentials from the device
Identification of the device failed.
Finished at local time: [05.29.19 14:12:49]
WorkID: 61078644


here is info:



Gathering information...
Reading identifiers...
IMEI: 000000000000000
SN: P6Q7N14A15002171
BT: 68A0F69DFE59
WiFi: 68A0F69DF406
Information
Wifi MAC: 68:a0:f6:9d:f4:06
Bluetooth MAC: 68:a0:f6:9d:fe:59
SIM card state: ABSENT
Model name: HUAWEI MT7-L09
Manufacturer: HUAWEI
Device code: hwmt7
Product name: MT7-L09
ABI: armeabi-v7a
Language: en
Region: GB
Android version: 4.4.2
Build id: HuaweiMT7-L09
Build display id: MT7-L09V100R001C00B137SP03
Build description: MT7-L09-user 4.4.2 HuaweiMT7-L09 C00B137SP03 ota-rel-keys,release-keys
Build date: Fri Feb 13 20:04:03 CST 2015
Build UTC: 1423829043
Build characteristics: default
Build product: hi3630
Build fingerprint: Huawei/MT7-L09/hwmt7:4.4.2/HuaweiMT7-L09/C00B137SP03:user/ota-rel-keys,release-keys
Build SDK version: 19
Boot serial: P6Q7N14A15002171
GSM version: 21.223.00.00.031
Current phone type: 1
Network type: UMTS
RIL version: android infineon balong-ril 1.0
Data encryption state: unencrypted
SOC: hi3630
Board type: MT7-L09
Board platform: hi3630
UsbConfig: manufacture,adb
Debuggable: 0
Finished at local time: [05.29.19 12:01:24]
WorkID: 61070194



thank for your help.