A few questions before I purchase this device. Does it have Google maps and navigation which works as good as the original phone in the UK? When purchasing the dual sim version are both numbers active simultaneously? Does the phone come with a warranty? Is the phone capable of receiving 4G from the Three Network in the UK? Reply:yes,GPS works well in UK like original,dual sim version is dual sim dual standby - means you can use 2 sim cards at same time.all the products on our site have 12month warranty.you can use 4G lTE network in UK....