problem trying to repair F4 DUB-LX3

SigmaKey v.2.33.03
268071440 Sigma dongle 2.33, Initializing...OK
Pack 1: Activated
Pack 2: Activated
Pack 3: Activated
--------- 2019-07-24 19:19:40 ---------
SigmaKey 2.33.03 Qcom: Restablecimiento de IMEI
DBAdapter Reserved Interface (COM803), Proveedor:: Huawei Incorporated, Versión de drivers:: 2.0.6.725, Fecha: 27/11/2016, USB\Vid_12D1&Subclass_11&Prot_23
Removing firmware protection....Phone model: Qcom; DUB-LX3
Unfortunately, heuristic method have been failed.