I took my 2015 to the Toyota Dealership today where they assured me that an Entune software/firmware update would fix the crash, freeze, reboot problems I was having, just like all of you have described above. Guess what? I started the engine and Entune froze before I even pulled out of the dealership, and on top of that they had charged me $55.00 for the update130.
While I was waiting to reschedule I googled the Entune issue and I find this having been posted July 19th at cars.com:
https://www.cars.com/articles/2014-2015-toyota-entune-issue-1420684960142/
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2014-2015 Toyota Entune Issue
By Tom Torbjornsen
CARS.COM
The problem: In vehicles with the Entune audio system, Bluetooth may sometimes disconnect from Android phones, or from the iPhone 4 when connected via USB. The radio may reboot when multiple functions are being used at the same time, or after completing a navigation route by voice command. This may be due to a software glitch in the audio system.
Vehicles affected by service bulletin Equipped with Entune system:
· 2014 Toyota 4Runner
· 2015 Toyota 4Runner
· 2014 Toyota Highlander
· 2015 Toyota Highlander
· 2014 Toyota Highlander Hybrid
· 2015 Toyota Highlander Hybrid
· 2014 Toyota Sequoia
· 2015 Toyota Sequoia
· 2014 Toyota Tacoma
· 2015 Toyota Tacoma
· 2014 Toyota Tundra
· 2015 Toyota Tundra
· 2015 Toyota Avalon
· 2015 Toyota Avalon Hybrid
· 2015 Toyota Prius V
· 2015 Toyota Sienna
· 2015 Toyota Venza
Corrective action: Dealers will reprogram the Entune audio system control module.
Warranty info: This service is being performed free of charge under Toyota's limited new-vehicle warranty.
What owners should do: Call your local dealer with your vehicle's identification number to determine if it's involved in this service bulletin. You can also call Toyota at 800-331-4331 or the National Highway Traffic Safety Administration at 888-327-4236. Reference TSB No. SB0035-16.
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If nothing else, I am going to get my $55.00 back tomorrow.
For what it's worth, here's the version numbers after the update performed today