The best replacement for metro is boost.

The best alternatives to metro are rated as following:
★★★★★  boost
★★★  retro
★★★  subway
★★  atom
★★  cxf
★★  fallout
★★  stalker
★  prizm
★  boost mobile
★  urban
★  virgin mobile
★  ford festiva
★  aero
  macho
  festiva
  spectrum
  vino
  metrolink
  axis2
  uccs
  rer
  aspire
  antagonist
  axis 2
  long haul

Your alternative for metro is not listed? Suggest!
Speaking about metro, one probably shouldn't forget about tmobile.

Other search terms related to metro and their ratings are:
★★★★★ tmobile
★★ trousers
You have in mind a companion for metro and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of metro in all years. Click on graph for more.
metro
boost
retro