Xamarin forms and prism and IEventAggregator instance from model class

How do i get access to the IEventAggregator from a class?

using AssetofThings.Events;
using Prism.Events;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Timers;

namespace AssetofThings.Models
{

public class DeviceInfo : INotifyPropertyChanged
{
    IEventAggregator ea;
    public DeviceInfo()
    {
        App.Current.

        ea = Container.Resolve<IEventAggregator>();//******   ERROR..doesnt work
        aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);
        DeviceInfo.Current.aTimer.Interval = 5000;
        DeviceInfo.Current.aTimer.Enabled = true;

    }

    private void OnTimedEvent(object sender, ElapsedEventArgs e)
    {

        ea.GetEvent<RequestGeoUpdateEvent>().Publish("RequestGeoUpdateEvent");//*******WANT TO publish an event

    }

    // Singleton
    public static DeviceInfo Current = new DeviceInfo();

   public System.Timers.Timer aTimer = new System.Timers.Timer();


    private int _updateseconds=60;
    public int updateseconds //seconds
    {
        get
        {

            return _updateseconds;
        }
        set
        {
            if (value != updateseconds)
            {
                _updateseconds = value;
                OnPropertyChanged("updateseconds");
            }
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        if (PropertyChanged == null)
            return;

        PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
}

}