Please excuse me if this is a double post... Last one hasn't shown up after 30 minutes...
I, like many others on this forum, struggled with getting my phone to unlock my Model 3. Many times it would work fine (within 5 seconds or so), but often enough it would take longer. Sometimes 30 seconds or more. It was an older Asus Zenfone 2, so I was happy that it worked most of the time. I do like the convenience of no keys or fob.
Often, turning on my phone was enough to cause the unlock. Sometimes I would have to open the app and unlock through the app. Rarely, it would still be asking for a key card by the time I was ready to drive. Once I was forced to use the key card due to no cellular coverage (glad to have that card as a backup!).
As far as I could tell, the things which seemed to be correlated with longer unlock times were:
2) Full load of groceries
3) Wife tapping her fingers on my panorama roof, with that glare (even though HER phone is paired -- it's certainly still MY fault :-) ).
4) Any combination of 1, 2, & 3
5) Showing off the car
I went through all of the phone settings I could find to force bluetooth to stay awake, to no avail. Even installed tasker to try to send wake_up events when near the car. No joy. Couldn't even detect BT until AFTER the door was open (which is kind of too late).
BTW: I NEVER had a problem with walk-away lock.
Well, just recently my phone died.
So I got a new phone. Not a fan of Apple prices (and mind control), or Samsung quality (my wife & daughter hate their Samsungs, and I can see their point). I wanted wireless charging and NFC, and I needed to pick it up at Best Buy that day. One phone matched those constraints: Sony Experia XZ2. I have no experience with this phone, but hey you only live once.
I've been using it for 2 weeks now, and I can report that the longest it's taken to unlock is maybe 0.5 seconds (i.e. just barely detectable). And that happened once. Every other time, there has been no noticeable delay: push the handle, and it opens.
I also note that it stays connected to the car even when in the house (even though walk away lock is working) -- so I'll definitely be watching for vampire drain.
Bring on the rain! It's time to go shopping!