Hi, I'm hoping someone might be able to help me...
In August 2015 I purchased a Samsung Galaxy S6 on eBay from what seemed to be a trustworthy "phone company" with very good reviews. I received the phone exactly as described, brand new and sealed and factory unlocked. I have been on a Sim-only contract with Vodafone for a long time and I immediately began using the Sim in the new phone with no problems at all for the next 6 months or so.
However, in February 2016 the phone suddenly lost all network coverage and after a few confusing phone calls with Vodafone (which also involved me s