Fxo card and gsm terminal recommendations

I want to setup a gsm terminal at my asterisk outbound in a local scenario and a fxo card for pstn termination at my asterisk inbound. Please recommend me some cheap and easy to configure asterisk supported gsm terminals and fxo cards. Kindly tell me either I can use a mobile phone instead of gsm terminal or not. if yes then kindly guide me about its configuration.

Thanks in advance