The fourth beta version of iOS 6 has added a new Wi-Fi Plus Cellular data option for iPhones and iPads. AppAdvice reports that in the General>Cellular section of iOS 6 beta 4’s Settings app lies an option called Wi-Fi Plus Cellular. According to the screenshot posted in the report, the option is designed to “allow apps having trouble with Wi-Fi to use cellular data.” Notably, iOS 6 beta 3 appeared to enable such behavior by default;…