I didn't see your post of last 30 Sept 2017, as I had stopped reading/checking AC and these forums by then.
But I've had my S7A now for over 15 months . . and it's been perfect; has ran & performed perfectly and flawlessly with not a single glitch---no "laggy, freeZing, glitches, heating up/burn up"...as you unfortunately experienced--- of any kind.
It's still super fast, great Wi-Fi & cellular performance, no dropped calls (that I recall), great email performance, great MMS performance, great speed & overall app performance, great storage space still available, great everything. It also has never had any problem in immediately connecting & transferring files, data & photos to our laptops & desktops. So maybe I got lucky.
As mentioned abv ^, in June 2017, I returned the AT&T S7A (made in Korea, btw), and ordered an 'Unlocked' S7A from amazon (which upon receiving, was somewhat concerned to see that it had been manufactured in Vietnam :O ), and thus had to pay the AT&T $45 restock fee, but it was well worth it-- as the savings were nearly $250. and the S7A I ordered thru amazon has been perfectly flawless.
Anyways, perhaps I got lucky, but my S7A has been fantastic, and continues to be in every way, as I'm still using it. In fact it's been a much better phone than my wifes' Note 5 & Note 8, and of course much much better than my old Galaxy S3.
So all in all . . . .oh wait, there is something I don't like about the S7A; its speaker audio is horrible !=(
The 3.5mm audio isn't too bad, but the speaker really sucks, and has never been able to be turned-up loud enough. Same goes for the mic ---whilst on 'speaker' phone calls--- as it's equally bad, with other parties having trouble hearing me when on 'speaker', so it's bad both ways, speaker & mic. =(
Aside from that ^ though, I've been very happy with the S7A, so again maybe I lucked-out.
I've had an S7 active for about a year...though I've had 2 replacements. The first S7A that I received in July/August last year would not update from AT&T. I tried factory resetting umpteen times, but every time it would attempt to download the next most recent update, it would fail. AT&T gave me a warranty replacement that started seeing terrible battery life within 2 months of use. The Second replacement I still have today and have been using for 10ish months.
Currently I've got the following issues with it-
1-Battery life. Even with pure black overlays, running in battery saver with data saver, samsung sleep on all apps, background processes disabled for all but Android system and Hangouts, no FB or FB messenger, no Always on Display, Aggressive Doze enabled, always in FHD or less, the battery life is awful *IF* I use the phone. With the screen on at any usable brightness, the battery use after a few minutes jumps to ~10-20%/hr. Additionally, streaming videos or even using Google News can cause the phone to heat up to a quite hot temperature right around the power button. I've tried clearing cache after every OTA update, and I've just tried a full discharge and recharge(typically I recharge at 20-30% and stop charging around 80-90%), but it's still a hog.
What's odd is that idle battery life isn't too unreasonable on Wifi/4G, it sits around 2-4%/hr(measured with GSAM Pro) typically. Even at home though, where I'm in airplane mode with WiFi on, the phone exhibits the same dismal use if I have the screen on.
2-Heat. This is related to
#1 . If I use the phone for anything intensive, games, lots of web browsing, News feed with lots of screen scrolling, the phone gets HOT on the right side near the power button.
3- Recent apps button and back button are getting mushy. I'm not rough on this device. It's still in great cosmetic condition for the number of outdoor activities I've taken it on. I've never experienced a rough drop onto any outdoor surface. It's fallen on our soft faux wood floor, but only onto the rounded, rubberized corners of the phone. Still, the buttons are caving in toward the fingerprint reader. The phone is out of warranty now, so I can't do anything about it. I would love to know if it's a setup issue. So can anyone still following this and that still has the phone and is still happy with it's performance share their setup?
In addition to the things i mentioned, I'm also using Evie launcher, and all-in-one gestures. I'm not sure that these are causing high use, as they never show up in GSAM or in the Default Battery Stats.
Here's a for instance- I was at 79% battery, and let the phone update 15 apps. I am in a full signal wifi and 4g LTE service area. The phone lost 11% battery updating the apps in less than 5 minutes and it also became very hot.
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