Huawei E3531 unlock problem

[S_V_H]

Hi
Modem Huawei E3531 locked to Kyivstar Ukraine

Found modem : E3531
Model : Huawei E3531
IMEI : 864576011002650
Serial NR. : D9LBY14A14002668
Firmware : 21.318.29.00.174
Compile date / time : Jul 31 2014 15:38:45
Hardware ver. : CH1E3531SM
Dashboard version : UTPS23.015.05.01.174_MAC23.015.05.01.174
SIM Lock status : Locked (Card lock)
Wrong codes entered : 10 (unlock attempts left : 0)

Credits left : 41


When i try to unlock i allways got error 37 (Modem with non original sim inside)
I tried many times with no success

After i flashed firmware to v 21.318.05.00.00 and press Search in software

Now modem unlocked
I dont know, it happens after flashing or what?

Found modem : E3531
Model : Huawei E3531
IMEI : 864576011002650
Serial NR. : D9LBY14A14002668
Firmware : 21.318.05.00.00
Compile date / time : Sep 9 2013 16:48:08
Hardware ver. : CH1E3531SM
Dashboard version : UTPS23.015.05.01.174_MAC23.015.05.01.174
SIM Lock status : unlocked
Wrong codes entered : 0 (unlock attempts left : 10)


Credits left : 39


My question:: why server charged me for 2 credits????

[Vincentas]

2 crėdits taken because you are using old software version. 2 credits added back.