If the modem was locked, it would require you to enter an unlock code after the PIN code. Just put in another SIM card, which is on another network, and if you can get to the point that you can send an SMS through Mobile Partner, then your modem is surely unlocked.
Fonic is still the best deal for national (9ct/min) and international calls (UK fixed lines for 9ct/min and mobiles for 29ct/min). For further details please refer to
http://www.prepaidgsm.net/forum/euro...-visitors.html