Sprint LTE failure on Hw24 K1

My hw24 failed to get LTE ever since the AAW378 system update was installed.
The AAY820 update did not correct the problem. My phone was replaced through Sprint's insurance carrier to a Hw26 phone. Today the AAY820 installed and I get LTE so the problem seems solved.

I am however disappointed in Sprint and BlackBerry over this issue as it wasted a significant amount of my time from April to the end of June. The inability to rollback the phone and poor backup solutions compared to a Q10 are major shortcomings of this technology.