Sencha Version: 2.0
Device : iPhone 3G
Browser: safari

I converted my app into production mode and the size of my app.js file is 720 KB, this means that my app is a big one so when I open my app on safari in iPhone 3G I get this error "JavaScript execution exceeded timeout", On refreshing several times the application shows up but most of the time I get this error, I am not sure why this is happening, the application works fine on iPad and iPhone 4.

Any help is appreciated.