If you and your husband both have Iphones, then you can use the find my iphone app for free. If you sign in on your phone with the other's apple id then you can see where their phone is on the find my iphone app even though its only intended to find your phone. Don't think they intended it to work that way, but it does, and it works great. You don't need cell service either, anytime the phones gps is working the app will work.