ATT/Sprint MVNO Good2Go Mobile became the 20th member to get added to the cheapest cell phone plan list when all of their monthly plans got their data allotments increased. All monthly plans include unlimited talk and text with 100 MMS picture messages and varying amounts of data. Good2Go Mobile qualified for the cheapest prepaid phone plan list when they updated their $30 plan to include 500 MB of 4G HSPA+ (or 3G if on Sprint) when it previously did not include data. The $40 plan got a data boost from 250 MB to 1 GB while the $50 plan got its data amount doubled from 1 GB to 2 GB.
Good2Go Mobile's plans in general aren't particularly impressive except for the $30 plan. The $40 and $50 plans get blown away by ATT's own Cricket Wireless brand where $35 buys you unlimited talk, text and data with the first 2.5 GB being LTE (limited to 8 mbps download speeds). The $30 plan however is one of only two ATT MVNOs to make it to the cheapest cell phone plan list so that's where you can find value if you need to be on ATT's network and don't require boatloads of data.
A summary of Good2Go Mobile's prepaid wireless monthly plans can be found in the infographic below. Extra data can be added to each plan at a rate of $10 for 500 MB and 1 GB for $20.