My F1 VISA had been approved but as of now i had planned to leave for next intake with this F1 VISA approval , Kindly let me know how many months/days is this F1 VISA approval is valid to enter US for next Intake with this VISA?
Your visa is OK if it is still valid when you plan to enter in US. All you would need is a new i20 from same university. For example if you plan to enter in fall 16, you need i20 for fall 16 from same university. I have known cases where people have deferred twice and entered US 1 year after the issuance of the f1 visa.
You definitely need a new visa if you plan to change the university , otherwise you are good.
One simple precaution: please ask university to issues new i20 with same sevis number (as your existing i20). This will make your life easier.
PS: DO NOT GET MISLEADED BY 5 MONTH RULE. IT IS ONLY APPLICABLE TO PEOPEL REENTERING. NOT FOR YOUR FIRST TRAVEL. SOME PEOPEL MAY TRY TO CONFUSE YOU. THE INFORMATION I AM PROVIDING YOU IS FROM MY PERSONAL EXPERIENCE.
MrRobot, thanks for youre suggestion. It was very helpful.