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Samsung A3 2017 in 2022 - struggling

Sep 28, 2020
62 (0.06/day)
Hello, i own A3 2017 because that is the size phone i can handle. I have some questions i hope you can help me with.

1) i have data turned off most of the time. When i turn it on, suddenly i feel lag - phone is doing plenty of stuff in the background, most notably checking for google store updates. How can i turn off this thing ?

2) What else can i do ? The phone clearly has plenty of horse power because sometimes it works extremely fast. I click on messages or calls and it opens instantly, i open gallery, camera, same thing. But other times it will take seconds. Clearly something in the background is harming my experience. I disabled all the apps i could, prevented them notifies, removed their permissions, disabled all settings i could, applied other general tweaks i could find online. I cant root my phone since my main bank app that i need requires a stock rom.

3) Anything at all i can do to slightly improve camera ? I have it on default settings and dont know what any settings do nor can i find any guide which settings are best to use to get at least decent pictures.
Feb 6, 2021
1,942 (2.30/day)
Processor AMD Ryzen 9 7950X
Motherboard Gigabyte X670 Aorus Elite AX
Cooling Noctua NH-D15 Chromax. Black
Memory 2x16GB G.Skill Trident Z5 NEO 6000 CL30
Video Card(s) Zotac RTX 4090 AMP Extreme Airo
Storage WD Black SN850X 1TB + 2x 2TB, 2x 4TB Crucial MX500, 2TB Samsung 870 Evo.
Display(s) Alienware AW2723DF, LG GP850-B, LG GN950-B
Case bequiet! Pure Base 500 FX
Audio Device(s) Bose Companion Series 2 III, Sennheiser GSP600 and HD599 SE - Creative Soundblaster X4
Power Supply bequiet! Dark Power Pro 12 1500w Titanium
Mouse Logitech GPRO X Superlight & G502 X
Keyboard Corsair K65 RGB Mini, Razer Black Widow V3 TKL
VR HMD Oculus Rift S
for your first two problems i'd recommend a factory reset.