sim900a reference schematics

[sp2012]

Hi,
can anybody share reference schematics for sim900a please.
In my sim900a sim_vcc,sim_rst,sim_clock always 0v.
I given 22E resistors inbetween module sim_data,sim_clock and sim_rst to simcard holder and i given 220nf capacitor in sim_vcc to ground.other then this anything i need to give.please can anybody share reference schamatics for sim900a please.

 

[nnaveli]

hi pls give your chematic so that we can help.