Monimoto smart alarm :
After a bit of searching I just purchased this device as I didn't have any alarm on my bike, so here are my thoughts for those considering to get an alarm or a tracker (sorry for the imperfect english) :
The device has two compartments, the main unit and a key fob. It comes with a sim card which works in all EU countries, otherwise any other sim can be used.
After placing the batteries in both, following the app to pair them, ready to go. No wiring needed, I have simply placed the main unit under the seat.
When it detects movement it starts searching for the key fob and if found then it stays "ready" mode, keep silently listening. If the fob(the owner) is away more then 10m then in case of movement it goes to "alarm" mode and send an automatic call to the registered owner.. This is done after like 30-40sec after the movement. I left the key in my house then just lifted the bike a bit, it worked every time precisely.
After the call given, it provides the gps coordinates every 4-5 minutes.
The batteries are replaceable, lifetime is around a year or so, depending on how often goes to alarm mode (gps drains can be pretty drastic).
This device cost £150 in Uk, first 2 months are free then around £3 per month and it includes international roaming (within EU, but you can use other sim)
It is not a real time gps tracker, it's more like a silent alarm which best for notifying you if your bike is on the move and I think it's pretty good for what it is considering how easy to set it up and use ..
I would definitely recommend