Cricket Wireless (Review) offers an unlimited plan for $55/month for one line. However, customers can now prepay for three months or one year in advance to get the same plan for as low as $25/month.
Visible keeps its plans ... unlimited hotspot data; the base plan is limited to 5Mbps, and Visible+ is limited to 10Mbps. Still, for keeping your other devices connected when there’s no Wi-Fi ...
I can also talk about Verizon's prepaid plan ... their internet service through the provider. Adding multiple lines lowers the cost of unlimited data plans to $30 per line with Xfinity Mobile ...