You unfortunately are not able to . . You can delete apps that you have downloaded to your iPhone, but not the apps that are rooted in the factory settings of the iPhone. However, there is a way of moving the original apps to another area, which gives the appearance of the original apps being removed .
If you are trying to delete an app without an x, it means that you cannot delete it. The apps that cant be deleted are the ones that came preinstalled on your iphone. In other words, apps that are preinstalled cant be deleted while apps that you install can be.
Turn it off completely then delete then get them again.
Press the Home button.
you hold your finger on them and then click the cross that will be next to them
Hold the app you want to delete. Hold it for a couple seconds until all the apps on the page start jiggling. You will see a black x. Tap that and you can delete the app. You can not delete any apps that are part of the iOS software.
Keep pressing it until it starts shaking then a cross should appear in all the apps and if you press the cross it asks you if you want to delete.
Your iPod will not delete apps on its own. You must delete the apps yourself.
First thing you can do : restart the iPhone if that doesn't work: connect it to your computer and open iTunes. There you can try to do an update (if there is one). if that doesn't work either, go back to your iPhone. click twice on the home button, the multitask bar will appear and tap on one of the apps in that multitask bar. Tap it for some seconds until all apps in the bar start moving. You can now "delete" this apps from the multitask bar , this will not delete them from your iPhone ! Maybe your RAM memory is full, and then a cleanup of your multitask bar can be a solution
if is one of the factory installed apps like maps and stocks app they cant be deleted
You buy the iPhone app
apple create the apps on iPhone