Issues i'm seeing after the update
1. Phone still bounces around network modes unless its on LTE. If i'm only in a 4G (HSPA+) Area, the phone will sit there and idle in 3G unless it wants data, then it kicks up to 4G. Not sure if this is by design to save power or not.
2. If I am in an LTE area and im locked onto the LTE network (phone indicates LTE); lets say a subway tunnel or elevator the phone will not reconnect to the LTE network afterwords. I've had cases where it gets stuck in "E" and wont even connect to the 4G network (HSPA+) without restarting the phone.
3. Still have purple greys (keyboard, pinpad, etc) when the phone is in a dimly lit area or if I set the phone to low brightness. A couple phones I played with in store and intentially put into low brightness mode did not have this issue.
4. WIFI is super spotty. Sit it next to my other phone that has full signal and its fine this phone is up and down and all over the place.
5. Mobile Hotspot (tethering) no longer works. Worked fine pre update, post its mostly dead. Sometimes it works though, i'd say its about as spotty as the WIFI is which could indicate more issues with the phone.
That's all i've been able to find thus far. After reviewing a lot of forums and without having actual serial numbers what i'm starting to suspect is that there was an actual bad batch oh phones that was released that had/have definite hardware problems. Nokia was hoping that a firmware update could fix the problem and it has for some; but honestly how can they confirm this? It would be incredibly hard to test that a firmware update would resolve issues for every phone.
I tried a master reset, didn't resolve anything.
Did the firmware update fix the data bug? Yup, but it caused at least 3 more issues with my phone that were not present before. Good thing this phone was already deemed DOA and I'm getting a replacement.
