iPhone 4s crashing during common tasks

Hello,

I recently posted an issue that was prompty deleted due to the negative nature of it... um... sorry. Anywho, my iPhone 4S has been "crashing" very often while trying to perform common tasks such as searching via Safari and attempting to take a photo (both via the photo app and within iMessage). It will also randomly dump to the "reboot Apple screen" Any ideas? FYI... I'm currently running iOS 7.1

Thanks!