Thank you very much for all your inputs, ive already learned from my company that it is their policy not to give NOC. i have also learned that even though i havent completed my 90 days probationary period they will allow me to resign and they will not fine me or pay any penalty except for the ticket that i have to shoulder (which for me is not a problem).
Now can somebody explain this to me, I have undergone medical and fingerprinting how long will it take before the residence visa (Labor ID) is released. What about the single entry visa that they put on the passport that says work visa, validity 6 months but duration of stay 3 months, does this mean that it is a temporary or visit visa and when i go home and consumed the 3 months i can go back to Qatar without the NOC since they havent issued a residence permit and work visa yet.

Your inputs will be very much appreciated, I know there are lots out there on a similar situation and these answers will help them in some way to resolve their problems. Thanks!!!