I am sorry to say it but this is a load of bullcrap. I updated 3 devices; Jolla sbj-1, Jolla model-C and Jolla tablet when the update came online and all went OK without any problems. The one and only device which does have a lot of updete problems is my self-compiled Hammerhead device which did not update cleanly with OTA and for which I was unable to compile a fully-working 2.0.4.14/cm12.1 despite several tries...