nele, I think you got your info wrong. Mig-21SMT's wasn't exported to Iraq at all!!! The Mig-21SMT was made for PVO use and
home use also. The engine fit still didn't provide enough thrust to keep up with the MiG-21SMT's weight growth, and in fact the MiG-21SMT was something of a disappointment, being built in limited numbers. So the Znamya Trudaya plant built 15 examples of an export version of the MiG-21SMT designated the "MiG-21MT" or "I-96T" in 1971, but they never left the country. So that means that Iraq never had any Mig-21SMT or Mig-21MT was exported. Also the Mig-21SMT was fitted with a
R-13-300 engine not the Mig-21bis. Also that's why the Mig-21bis was fitted with a much powerful R-25-300 engine so they won't make that thrust problem again as the Mig-21SMT!!! The R-25-300 can out climb the F-16A types and the F-14A also.
Iraq did made a deal to get Mig-21bis but some wasn't never delivered. As for the Egyptian Mig-21's they were upgraded to carry Sidewinders not Sparrows ( think) and other western avionics .