what the problem with my modem mf626?

[RaMzEz]

hi!
i have broblem with my modem
i am instaled dc unlocker to my Pc and after all operations i have this message in dc unlocker interface:

Found modem : MF626
Model : ZTE MF626
IMEI : 359672021333599
Firmware : BD_BLNP673M3V1.0.0B04
SIM Lock status : unlocked

but when i put in modem SIM from anather mobile operator- modem dose not work! what the promlem?
after this, i instaled unbreded software for mf626(from this site)- modem work, with all SIM!! but only 90 seconds after this time - connecting failed! and i can't to connect any more until i am not take-off and put on back modem to pc! after this it work 90 seconds again.....
i can't understand what the problem?
may be becouse i not change own software on modem to unbrended software(telstra)? but i am afraid that after this, it will be does not work!
may be some body can help me?

i am excuse for my english(i am from russia)

[Avantha]

Your modem is unlocked.You can use any sim.I think there is a firmware problem.Use the original sim with the original software and check wether your modem is working or not.

[RaMzEz]

when i use the original sim with the original software it work exactly ! but if i put anther sim in to the modem: software says that sim is not own and modem can't work!!!after this message it going off!
what you think about this?

[Avantha]

Please contact live chat,we will try to help you.