Actually this modem is able to work with different mobile network SIMs. And I prefer this becuase I can easily switch SIM cards when I change location and that network is not available (just as you can do with an ordinary mobile phone). The problem with this HSPA 3.5G USB Modem is that the accompanying software does not have means to enter a voucher pin for account top up. Everytime I run out of unit for a particular mobile network, I will have to remove the SIMs into my phone before am able to top up or recharge the account.
I thought I could get a software that will provide an interface to enter a voucher code or pin to recharge my SIM in the modem directly through the pc.