Json Deserialize by Jil throw Exception

Question

i have this piece of code:

//JSON is in Jil library
var a = JSON.Deserialize(@"{""PhoneNumber"": ""09214523155"",""Password"": ""1928160"",""Token"": ""string"",""SubSystem"": ""string"",""Version"": 0,""DeviceType"": 0} ", typeof(LoginContactInput), Options.ISO8601);

and it is my LoginContactInput class and DeviceType enum:

public class LoginContactInput 
{
    public string PhoneNumber { get; set; }
    public string Password { get; set; }
    public string Token { get; set; }
    public string SubSystem { get; set; }
    public int Version { get; set; }
    public DeviceType DeviceType { get; set; } //DeviceType is an Enum
}
 public enum DeviceType
{
    Mobile,
    Server
}

but this throw an exception that says : Expected character: '"'

i think my json is correct

what is wrong?