I've noticed that my phone key and fob ranges are drastically different. Maybe I have a weak transmitter on my 4-year-old phone, but when I use it as a key, it will lock just from me walking from driver side to passenger side of the car. With the fob, i am about 10-20 feet away before it locks. I'm curious what the range on your fobs and phone keys are? Do the new flagship phones have longer range than mine?