The amount of ignorance you are displaying is staggering, mate.
If you still think that Iran builds some upgraded scuds, then it is time for you to do some research. You can begin by reading those articles I've posted on the previous page.
When you are done with that, I'd advice you to watch the following analysis by leading Israeli missile expert Uzi Rubin.
On Iran's ballistic missile force being an efficient and effective alternative for a vulnerable air force:
Watch from minute 06:00:
How Iran's ballistic missile force has evolved into a strategic threat, as it now can accurately hit critical military and civil infrastructure in the region:
Watch from minute 46:00
When you are done with doing your homework, you can come back with following-up questions.