so i jailbroke my iphone like a month ago and it has been working fine but then yesterday it froze on the apple logo when your turning the phone on and theres a loading circle under the apple logo thats also frozen. i tried holding down the home and sleep buttons and it turns off and then when i try to turn it back on it has to charge and then freezes at the apple logo. It seems like it just holding a little charge then it goes away. and itunes isnt reading that its plugged in. does anyone know what to do?