I can definitely help you resolve this! When you swipe up from the bottom, this opens the Control Center. From there, check to see if the padlock icon is white. If so, click to disable. This setting disables the portrait mode lock, so your phone will rotate into landscape.
MichelleH_VZW Follow us on Twitter @VZWSupport If my response answered your question please click the "Correct Answer" button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!!