TaiKing

Well it took long enough to happen but an unlocked version for the US market supporting the major carriers has finally appeared. http://www.androidcentral.com/galaxy-s7-unlocked

Yeah, that's not exactly an uncommon thing I had a family member who had an M8 that I ended up having to replace the charging port on myself because I couldn't find anyone that would do it for any sort of reasonable amount. In the end it turned out not to be too bad of a process, the hardest part was making sure I was getting the part with the correct connections which ended up costing like $10 on Amazon.

I don't know about Amazon prime music but this sounds like a thing I've encountered on and off for a long time with Pandora on android. After the app is updated sometimes it gets to where when on wifi it will take forever to load a song and if it does load when it goes to the next song it will skip over multiple songs before it manages to play another one if it does at all. It always seems to work fine over mobile data though. Usually with Pandora an update usually fixes it at some point but over the past couple years they have broken it again multiple times after other updates to where these days if I'm on wifi and want to stream music on android I tend to just go for a different app.

That would be it, on Nexus Devices in the battery screen in the options menu it's "Battery Optimization" too.

This one? http://www.ispot.tv/ad/AkqR/sprint-the-worlds-best-network

I don't suppose they managed to fix the signal bar issue in removing the spinner?

Recurring monthly payment setup.

I just got the update to show up on my old 720T device after reactivating it and then doing a factory reset.

If you haven't done it and are able to you might try using Samsung's Smart Switch PC app that replaced Kies to see if it will let you update it through there.

I'm using one of Samsung's older wireless charging pads, I think the one designed for the S4. This one: http://www.shopandroid.com/samsung-wireless-charging-pad/5A233A16833.htm It works well and I like the raised edges around the outside of it. The S6 sits nicely on it easily getting optimal positioning and I've had no issues with it sliding around which the newer Samsung ones have been more prone to since the phone just sits on top and it uses rubber too try to hold it in place.

Mine appears to have improved decently with the phone sleeping much better. I was experiencing the cell standby issue where my cell standby would be by far my highest use unless i used the screen a lot. It wasn't uncommon for my standby to say it had used 10-15% of the battery by the end of the day and be number 1 use of battery. Since the update i haven't seen it go over 4-5% usage by the end of the day but it still seems a bit high. Before i was seeing with lighter use about 2 hours screen on and my total time not over about 16 hours much, since the update i've been able to get 3 hours out of the screen with the total time sitting closer to 20 hours pretty easily. It hasn't been a massive difference and i'm not sure if it might just be a placebo effect but it has felt better for sure. Though I feel like they still have some issues they could continue to work on to improve it where they have improved some issues draining the battery but have not completely fixed them.

What is the difference in signal strength that you're seeing on the g2 and note 2?

Lollipop update appears to be incoming on both versions of the S4. http://support.sprint.com/support/article/Find_and_update_the_software_version_on_your_Samsung_Galaxy_S_4/WServiceAdvisory_542_GKB51952?INTNAV=SU:DP:OV:UG:SamsungGalaxyS4NonsprintSpark:FindAndUpdateTheSoftwareVersionOnYourSamsungGalaxy#!/

Looks like they're going to give the update another shot. http://support.sprint.com/support/article/Find_and_update_the_software_version_on_your_Samsung_Galaxy_S_4/WServiceAdvisory_542_GKB65037?INTNAV=SU:DP:OV:UG:SamsungGalaxyS4:FindAndUpdateTheSoftwareVersionOnYourSamsungGalaxy#!/ The regular non-Spark S4 also appears to be getting this. http://support.sprint.com/support/article/Find_and_update_the_software_version_on_your_Samsung_Galaxy_S_4/WServiceAdvisory_542_GKB51952?INTNAV=SU:DP:OV:UG:SamsungGalaxyS4NonsprintSpark:FindAndUpdateTheSoftwareVersionOnYourSamsungGalaxy#!/

The online process can be found here: http://support.sprint.com/support/article/Customer_Instructions_for_Change_of_Ownership/2a4c5654-b645-4613-8262-a689a275e885#! This can also be done in corporate stores I know, both account holders just have to be present to sign stuff. I don't know if 3rd party stores can do it or not.