Mehmood! you said contact field engineer, contact distributor, have lunch with him (or her if lucky), ask free samples from distributor etc. My tragedy is that the nearest distributor is few thousand miles away and a confilicting border (india and Pakistan) is between us. It is impossible to contact some one in india from Pakistan and ask him for lunch or free samples. Those samples may be cheaper then the expenses of phone call.
Here i should clear my side. I am an electronic engineer, working as a design engineer for a small company in karachi, pakistan. I also work on personal project given to me by various peoples. And i am also corrently working on some my own personal commercial projects. Now i need MCU or chips under quantity of 10 peices so that i can successfully make a working product (circuit), and if it works and it is cheap then i may have order for 1000+ quantity for mass production. Now i want to know how i am gone a make working circuit when i cannot get the chip i selected for it.