S3 mini clone i8190 imei null

I need help in repairing imei of clone S3 mini with imei=null

i am using latest version of volcano box

i successfully repaired dozen of phone with invalid imei

i used old method and new method

i used android tab to change imei

but nothing helped

i have original back up of phone plus i wrote another flash from another phone but still imei invalid

imei and network was 100% fine before i formated it for gallery error



please i need help to solve the issue



Edited : i have read almost every thread regarding this phone to change imei but nothing worked

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