Does it have it's own sim card inside the OBD2 or a smart phone must be in close proximity? If latter than I do not see much value in what can be achieved by b

Does it have it's own sim card inside the OBD2 or a smart phone must be in close proximity? If latter than I do not see much value in what can be achieved by buying a $15 OBD2 bluetooth adapter from Amazon and a $5 app from Google Play/iTunes. Then you own the data too. Metromile did it right by embedding a sim inside their unit. Thus allowing you to take advantage of it's remote monitoring capabilities and alerts when you say park your car in a variable parking zone.