@ digital210921 ...
Try the "MTK 65xx New Method for imei repair" first ...
If get any error of fail ...
Try rebuild imei in volcano android tool in USB mode ...
There are have three mode to repair imei ...
Try Mode 1 first ..
If fail then do root & try with mode 2 or 3 ..
You must to repair it to that way ...
Br,
AniAXN 