I bought a pack of 6 off ebay, but they come adrift at the edges too easily, I had the iphone 3 & had no probs, but that may be due to the slightly raised rim on the 3 which the 4 does not.
Does anyone know of decent screen protectors that stay in place? BTW I am not using a case or bumper which may help.

http://phonedevil.com/index.php/screen-protectors/iphone-4.html

I’ve got front and back screen protectors and with a bumper fitted they don’t lift at all

I got pack of two from the apple store that come with some sort of pre application plastic that you put on first, then take off, maybe to create static or something??? don’t know how it works, but they do, they’re brilliant

I bought an Otterbox case for mine which came with a protector that covers the whole front apart from the home button. It seems perfect and the case is a lot better than other ‘cheap’ ones too. I paid £19 off eBay and it’s waaaaaay better than the £20 ones I had for my 3G 🙂