My htc recently had a fatal accident and i am no longer able to use it. My girlfriend gave me her old iPhone 4 which she hasnt used for about 8 months now. the iPhone has a lot of apps on it and no sim card. Once i turned the phone on everything seemed okay it ran a little slow. i startede trying to open some of the apps like fruit ninja and words with friends but as soon as i had double tapped them they start to open and then they close and go straight back the screen where i tapped it. Is this phone broken or should i purchase a sim card, reboot it and attempt to use. thank you very much.