I have had this unit for 4 Years now. Even after two years they were nice enough to replace the unit after multiple support calls. Even after that it worked absolutely no different than the first unit. We mostly just use our keys now. It is a huge hastle. It only works if the phone is 6" from the lock and even with that 90% of the time you have to touch the lock at least 2 to 3 times for it to finally unlock. There is no point to this lock if I have to touch my phone to the lock each time I might as will just use my keys, it is actually faster.