Most people will have some experience of lugging around a tired handset, knowing they've an eternity to wait before upgrading. UK carrier O2 has just announced its solution to phone fatigue called O2 Refresh, which splits overall costs into a "Phone Plan" and an "Airtime Plan." Much like T-Mobile USA's new UnCarrier model, you're charged for the handset separately, so you can switch whenever you like as long as the current one's paid off. That price will vary depending on how much you lay down u
