I had the same problem than you, i just logged in the 2.5GHz and it worked (i hope they fix soon the 5GHz issue, it's really bugging me).
Yesterday i went to the store where i bought the phone, and they were esceptical with my phone, they asked if i can give them the phone for testin purposes, and when i turned on the phone, it rebooted twice, it even couldn't boot the lockscreen. The store seller couldn't believe it!
Then the man asked me to soft reset the phone, and when i did it, it appear the bitlocker error (asking to plug in a USB device containing a BitLocker recovery key)
Long story short, the seller asked me to give him my phone to test it and if it didn't work, it'll change me the phone for a new one.
Today i have to go check if it works... Wish me luck!