I got my Blackberry Storm from Verizon n I got it unlock, I inserted a T-mobile sim card from my brother's phone just to test it out and I switch the connection to GSM, the text works fine but I can't make or receive calls and that no circuit/channel available keeps popping out, someone told me my bro's T-mobile sim card might be an old sim card. I'm planning to get a H2O Wireless Starter Kit but I don't want to spend $60 on it if it'll do the same thing. any idea if putting a new sim card might fix the problem?