After upgrading my AC1450 to firmware version 1.0.0.34, smartphone cannot connect.

[sherberg55]

The router is up and I can connect via my iPad Mini 2, but I cannot connect my iPhone 5C, 6 or HTC One smartphones.  Also the security setting on both bands are not shown.  

[sherberg55]

Further analysis shows that the router is not allocating an IP address to the phones.  And occasionally, does not assign an IP address to the iPad also.

[netwrks]

Reset to factory default (and manually reconfig) to see if the issues clears up.