The JM-LL01 need a SIM card with text messages and internet data. The SIM plan alone will be enough to manage and monitor your device without any additional costs. You'll be able to receive all the device alarms and check the device position by text messages on your phone.  Potentially, you can manage your device without the mobile APP. Our APP offer a free plan that gives you the abilty to have an eye on your device 24/7 so, if your SIM plan is $5 per month, this is what you are going to pay. There are a lot of SIM provider, mentioned below, that will give you this service for very few dollars a month. If you need more advanced features you can select different plans with a slighty higher price, however, they are very affordable. In any case, considering also the SIM plan, you'll be able to manage each of your devices for less than $10 a month. Download our APP Ruhavik for free to explore our plans.