An accountancy practice <a href=" http://iorarua.com/iorarua/index.php?essay-style-writing ">essays for children in english</a> O2 has offered to write off 25 percent of existing subscribers&#8217; remaining contracts to help with the transition to 4G, while its recycling service will pay up to £300 for older handsets. Those on both SIM-only and O2 Refresh plans will be able to add another 500MB of data for £6 or 1GB for £10, while access to O2’s network of 90,000 Wi-Fi hotspots is also included.