I took out a 24 month contract on 4G with Vodafone as their map showed maximum signal in my area. Previously with Virgin where reception was patchy in my area in London. Despite this, the signal was worse with Vodafone - 0 bars! After dragging me out beyond the 14 day cool off period by telling me my phone/sim needs reseting, they finally told me (day 16) that the mast in my area was under long-term maintenance/upgrade since January 2016 with no completion date set - yet I had taken out service in February 2016 and they failed to tell me that! I was advised by them to set my phone to 2G as that would give me a better signal! After a few more calls to them and hours of arguing my case and speaking to their resolutions team, they released me from the contract. However they would not reimburse the cost of the glass screen protector which cost £20 for the Sony Xperia Z5 which I had to return to them, as they said it was my issue for buying accessories for the phone! A very unprofessional and mean-spirited company!