So my wife and I each has an iPhone and an iPad.
I've done iOS9 then 901 and then 902 upgrades to all 4 devices.
After upgrades, I noticed that it did at least 2 things (consistently to 4 devices) ...
1. Changed the name of the device to default (iPhone, iPad)
2. Changed the brightness to default which is about 10%
Not cool!!! Although I cannot remember which of the updates (9, 901, 902) did the change...
I've done iOS9 then 901 and then 902 upgrades to all 4 devices.
After upgrades, I noticed that it did at least 2 things (consistently to 4 devices) ...
1. Changed the name of the device to default (iPhone, iPad)
2. Changed the brightness to default which is about 10%
Not cool!!! Although I cannot remember which of the updates (9, 901, 902) did the change...