If Jailbreaking your iPhone 4 wasn’t enough to get you excited, then it has now been revealed by the clever guys over Grant Pannell that you can have Flash running on your iPhone 4 by following some very simple steps. It works in the similar way to how you would install Flash on your iPad. First you would need to jailbreak your iPhone 4, then simply “download the .deb, upload it to Cydia\AutoInstall on your phone via SSH, restart and you’re done.”
If you’re still a little stuck then check out this video below or check out Redmond Pie‘s detailed account of how to install Flash on your iPhone 4: