There is interesting question. If I install MT4 on my phone, will I be able to execute OCO scripts on the IPhone itself?
If not, can I arrange the scripts on the phone itself?
The iphone is a closed platform and you are unable to run any scripts on the iphone. Apple actually has a band on any application being able to run any applition or scripts within it.
This is the reason why emulator applications were removed on mass from the app store in the past, as you are running your main application and then running an application within it.
Apples reasons is that the script being run in MT4 on the iphone could be malicious and harmful.
Try windows mobile MT4 that might work
That won’t help him if he has an iPhone. 
Very true the new windows 8 phone is meant to have some functionality
Of windows 8 in it so in the futute it can run windows 8 apps on the phone and vise
Versa but until windows 8 comes out we wont
Know if this is the case or not