I know I've asked this before but the cut off if coming.... 5 lines with AT&T. Three have unlimited two have three gb a month. Switch to 40 gb. I use the most on one unlimited line... Usually about 5 Gb. Would also shut off my iPad on Verizon and tether with my phone since I use my iPad as a hotspot for my kids. I have 4gb on my iPad. I would claim 10 gb for my line... And leave the others to split... But combined they probably use like 5 gb a month.