I currently have a 700 shared voice and text messaging plan with five basic cell phones. Based on a conversation with a Verizon customer service rep and a chat session, it appears that converting a phone from basic to smart and adding 2Gb of data to the phone would result in a net cost increase of $30 per month plus tax, thus converting three phones would result in a net cost increase of $90 per month plus tax. Do I have this correct or are there any charges I missed?