No, if you choose to use the watch without the mobile subscription it will not work for the purpose it is meant. The GPS and location tracking information will be stored within the watch but without the sim card activated, there is no way for the watch to communicate this information to you or send you alerts. Simply put, all of the tracking information will be stored in the watch but with no way of transmitting that information.
This is an SOS device and must be used with our subscription service.