We're sorry to know that your phone service isn't working as it should. To our knowledge, the phone will go into roaming if the phone signal drops to zero on areas where roaming coverage is available. Signal issues like this could come from different directions, such as a service outage in your area, a phone setting, a hardware problem, etc. To look into this closer, please send us a private message with your phone number and address. We'll let you know if we need more information after we check on here. We'll be waiting for your reply.