Post originale di: oldturkey03 ,
natalie, given the age of the phone, it is entirely possible that your issues are related to a bad battery. Use [guide|1545|this guide] to replace the battery and make sure that you get the right battery when you replace it. This model iPhone is finicky about its battery and does weird things when the battery fails. If nothing else, it will provide you with a known-good starting point for any further trouble shooting. Hope this helps, good luck.