Well, actually I am very disappointed of many users here permanently talking of “promises” from FP related to “upgradeability”. I read through this page more than once, but could not find any word like “promise”.
Some people does not seem to be capable of understanding the (maybe slight) difference of using the explizit word “promise” and expressions like “Potential for upgrades and expansion; …However, to help our phone stand the test of time and the development of new features, we incorporated elements that enable upgrades and expansion without having to change the entire hardware.”
I can read words like “test of time”; “enable”; “upgrades”…where exactly did I miss the word “promise”?
There were some software upgrades as one may have realized…Android7 after Marshmallow and Lollipop, does not seem to count as it looks. 
I simply read what’s actually written, not interpret things into expressions just as I wish.
Imho this is straight unprofessional and speaks for bad reading comprehension.