One for my sister this as she's not signed up on Macrumors... Basically, i have a 3GS, she has a 4S. We both wont have a smartphone without a screen protector & we both like the flip wallet kind of case. A typical example being: http://www.ebay.co.uk/itm/BLACK-LEAT...item336cce658c Now with my 3GS, i don't have a problem - fit the screen protector, put the phone into the case & away i go. My sister did hers but the case where it grips the phone keeps lifting & bubbling the screen protector - not good. I don't know if it's this type of case, or just a faulty case. The 3GS has rounded edges whereas the 4S has box edges. She also had to have a bit of a battle to fit the phone in the case & a bigger battle getting the phone out. So right now she's having to use a phone sock, which she would rather not do. Does anyone have one of these types of cases & a screen protector & also avoids the screen protector lifting/air-bubbling?