Flex plan - pay 4 months up front for unlimited talk/text and 250mb LTE rollover data. Comes to $11.50 a month. You can buy extra data at $8-10/gb.
Flex Family - 4 Lines for $11.50 a month per line. Unlimited talk and text and 1gb to share.
You can buy less months or have less lines but it costs more/month. $11.50 for unlimited talk and text is hard to beat and the 250mb is a nice way to include a small amount of data since it rolls over month to month.
You need a purple sim to activate online but they are easy to get off ebay for a $1.
Looks good to me for light data users. Works on t-mobile. Also includes international calling to 10 locations.