I had a success with the Blu Life One LTE 2015 model and thought I should share how I got back to Kitkat 4.4.4.
Just like one of the users said: You can downgrade using the BLU_X010Q_V17_GENERIC.ZIP. Normally that zip has everything in it and a Qualcomm flash tool usually saved as QPST.2.7.425...
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