Help with the unlock E5306 android 5.1

Greetings I released an E5306 C4 with version 5.1 Sigma says it frees it but still asking for network unlock code, some help team ,,, Thanks

I leave the operation log

SigmaKey v.2.21.00
976752137 Sigma dongle 2.21, Initializing…OK
Pack 1: Activated
Pack 2: Activated
Pack 3: Not activated
——— 2016-11-22 23:22:52 ———
SigmaKey 2.21.00 ADB: Liberación directa
^ Android Composite ADB Interface
Versión: Linux version 3.10.72+ (BuildUser@BuildHost) (gcc version 4.9 20140514 (mtk-20150408) (GCC) ) #1 SMP PREEMPT Sat Dec 12 17:58:24 CST 2015
Modelo del teléfono: Sony E5306
Android 5.1; Firmware: 27.2.A.0.155; Fecha: Sat Dec 12 17:55:22 CST 2015
Versión: 27.2.A.0.155
Flasheo de banda de base: MOLY.LR9.W1423.MD.LWTG.MP.V45.P11, 2015/11/09 11:27
Procesador Baseband: MT6752
Software IMEI: 1 35xxxxxxxx
Software IMEI: 2 35xxxxxxxx
Zona de seguridad guardada en "C:\Users\Eddy\Documents\SigmaKey\security backupxxxxxxxxxxx_Sony_E5306_27_2_A_0_155_Sat Dec 12 175522 CST 2015.skb"
Liberando el teléfono…Hecho
Reinicio del teléfono…Hecho