For the past several months I have been unable to update my apps on my second generation iphone. When I try to update I receive a message that says 'there is not enough space download these applications. Please delete photos or videos.' I do not have any videos on my iphone but I do have 706 photos. Is this the reason why I am unable to update? (I only have 175 songs) If so, how many photos should I delete to be able to update aps. Thank you in advance for your help.