** Update 5/2021 ** still going strong. still have yet to pay for the subscription.. Remember Samsung says its an AT&T thing, AT&T says its a Samsung thing. I no longer fight, I embrace the free service.. 'They set up the rules, and lately I've come to realize that I have certain materialistic needs.'** Update 6/2020 ** device still working. Never did get the subscription figured out.. Then they wonder why companies lose money..***UPDATE 5/2020*** Well.. I realized today that my service expired... yet there seems to be no way to renew.. Some people say there is a link in the app. I can't find it.. There is a link that gives you your status, but there is nothing to renew. Samsung customer support says 'If once the renewal process starts you will be notified within the app with instructions on how to renew the SmartThings Tracker. However, You can also contact your network service provider to know about the renewal process of SmartThings tracker and for the subscriptions.' I can't really contact AT&T , its an AT&T Samsung arrangement. I haven't been notified, I've looked at all my messages and notifications, i've gone through all my wonderful samsung emails they've sent and not one about renewal. I'm on week 2 of trying to figure this out, it may be easier to buy a new one to get another year of usage..----------------------I've had this for 3 months, and I've been working on this review since December. Hope you find it useful.I bought this tracker with the sole purpose of tracking my electric bike (#GoSondors!). So this review will not cover tracking your pet, or children. It should also be noted, this cannot really be used as a fitness tracker. It does not integrate with any fitness type apps, its not designed that way. My purpose is to track an asset, and with that asset, i already have access to a usb charger (note this for later).The main reason I purchased this, was the current cell support through AT&T. I was patiently waiting for a verizon version, but it never came, and samsung dropped the price on this unit. Most inexpensive trackers use a 2G network, which, most 2g networks are phased out. the other factor was service cost. I've priced units on the market using current networks, and the monthly fees vary from $7.95 to $24.95 a month... This model is $5/month or $50/year through at&t.So I bought this track to track my bike, Its slightly bigger than a standard bluetooth based trackers. Depending on the model bluetooth tracker, its also about twice as thick , but still compact! [Photos]It uses the SmartThing app (not classic)... which. setting up i had many hiccups, but in the end i found restarting my phone fixed the hiccups i was having. Its accuracy comes and goes, and i get better results on my cellphone.Other things to note. It only works on ios and android phones and tablets. It does not work on samsung chromebooks (with android support). it actually doesn't work on anything else. The rest of the family is not into technology, so sadly there is no website to go to. to use the tracker, it is only on the app. So, in a way this hinders the device. my mother can't jump on the computer and see where the device is located. I would definitely like to see some sort of web based login system for the tracker.. I log into my samsung account online and it doesn't do much at all.So now lets get into things. As i mentioned before, my bike has a usb charger on it, so the tracker was purchased to be placed on the bike, and left alone. Was going to embed it behind the controller.. However i noticed something which i've verified . So here goes. If you plug the unit in to usb , the unit will charge to full. It then will run, till it gets low, then will power itself off. I have recently found this annoying.. My thought process is still that, keeping it plugged into the charger means its ready-to-go when you unplug... but sadly, if its been plugged in and charged and starts draining, you can end up with a moderate charged tracker when you unplug to use... Found this out last night when i unplugged it and stuck it in the car.. only to track it an hour later and it was 'very low'.. arg! The Battery Management System needs a firmware update or something.Once off, it will charge itself back up to full. But here is the kicker.. you have to push the powerbutton and hold it till it turns back on. the battery management system in the unit does not keep the unit topped off like a cellphone does. If samsung is reading this, i hope you update the firmware to allow it to charge itself when it gets low (or even 50%), when its connected to a power supply/charger. sadly in this case it is not really a set-it-and-forget-it situation. especially if you were putting it in your fleet vehicles and didn't want to tinker with it. But there is hope and a slight workaround. Given that it can run 3-4 days without charging. if you do have it plugged into usb that is connected to a method of interupting (vehicle turning on/off [cigarette lighter charger], or your bike has a power on/off etc).. AS LONG as you have power turned off for approx 15-20 seconds, and then back on. it will charge. So when my bike turns on, the charger charges. this ends up working out as I ride almost daily. it has to have that interupt, to start the charging cycle. I did verify i have the current version.My BEST advice is.. keep it plugged in like you normally would, but try and unplug it,15 sec, plug it back in, about 2 hours before you are going out. Its the only way I know to get maximum charge out of the gates.Tracking.. Well. It works nice.. i am always amazed by its tracking reviews for the day, when it hasn't moved an inch [SEE PHOTO}. It does seem to do well overall with general location. I have not tried tracking 'up and down'.. like putting it on floor 40 of a building and seeing how it tracks with elevations.Some cons to note. There is no beeper or alarm in it. so, if you lose your keys, it will not make a noise or vibrate to let you know where they are at. For this reason here is my little hack. Take the GPS tracker,on top of the tracker, i have a bluetooth tracker . i use 64mm heatshrink [for battery packs], to make a tracker-sammich. So now, the gps will get you in the general direction, and you have the power of the local bluetooth tracker (with noise/audio) to get you to where you need to be.