scrape your historical monthly data usage (in KB) from att.com

att.rb

#!/usr/bin/ruby
LOGIN, PASSWORD = 'your_number', 'your_password'

require 'rubygems'
require 'mechanize'

agent = Mechanize.new

agent.get 'https://wireless.att.com'
login = agent.page.forms_with(:name=>'loginActionForm').first
login.wireless_num = LOGIN
login.pass = PASSWORD
login.submit

puts 'logged in'

agent.get 'https://www.att.com/view/statementHistoryReflectionAction.doview?reportActionEvent=A_PMT_VIEW_ALL_AVAIL_STATE_HIST_LINK'
statements = agent.page.root.css('table.tableGen td a').map{|l| l['href'] }

puts "statement urls:\n#{statements.join("\n")}"

statements.each do |statement|
  date = statement.match(/stmtID=(\d+)\|/)[1]
  puts "loading info for #{date}..."
  agent.get statement
  agent.get 'https://www.att.com/pmt/jsp/mypayment/viewbill/viewFullBill.jsp'
  data_usage = agent.page.at('td[text()*="DATA ACCESS"]').parent.css('td')[2].text
  puts "usage: #{data_usage}"
end