As both watches, the Liberty and the Assure, use 2G and 2.5G networks, they are not guaranteed to work in USA as some American mobile networks have stopped using 2G and 2.5G networks.  American mobile networks are changing to 3G and 4G networks only.

The location data may not be sent to your app in areas that are not covering 2 G and 2.5 G and similarly you may not be able to make calls to and from the watches.  We do not advise you buying our watches for use in the USA as we cannot guarantee that the watches will work in the USA.